From 0e4af28d71de71383b5a232f68debe66ab55b580 Mon Sep 17 00:00:00 2001 From: MSVSphere Packaging Team Date: Wed, 27 Nov 2024 03:04:07 +0300 Subject: [PATCH] import pam-1.3.1-36.el8_10 --- .../pam-1.3.1-libpam-support-long-lines.patch | 595 ++++++++++++++++++ SOURCES/pam-1.3.1-pam-access-local.patch | 215 +++++++ SOURCES/pam-1.3.1-pam-access-resolve-ip.patch | 211 +++++++ .../pam-1.3.1-pam-unix-shadow-password.patch | 47 ++ SPECS/pam.spec | 27 +- 5 files changed, 1094 insertions(+), 1 deletion(-) create mode 100644 SOURCES/pam-1.3.1-libpam-support-long-lines.patch create mode 100644 SOURCES/pam-1.3.1-pam-access-local.patch create mode 100644 SOURCES/pam-1.3.1-pam-access-resolve-ip.patch create mode 100644 SOURCES/pam-1.3.1-pam-unix-shadow-password.patch diff --git a/SOURCES/pam-1.3.1-libpam-support-long-lines.patch b/SOURCES/pam-1.3.1-libpam-support-long-lines.patch new file mode 100644 index 0000000..6483b62 --- /dev/null +++ b/SOURCES/pam-1.3.1-libpam-support-long-lines.patch @@ -0,0 +1,595 @@ +diff -up Linux-PAM-1.3.1/libpam/pam_handlers.c.libpam-support-long-lines Linux-PAM-1.3.1/libpam/pam_handlers.c +--- Linux-PAM-1.3.1/libpam/pam_handlers.c.libpam-support-long-lines 2024-11-04 13:17:27.395991844 +0100 ++++ Linux-PAM-1.3.1/libpam/pam_handlers.c 2024-11-04 14:45:22.583441849 +0100 +@@ -16,21 +16,30 @@ + #include + #include + +-#define BUF_SIZE 1024 + #define MODULE_CHUNK 4 + #define UNKNOWN_MODULE "<*unknown module*>" + #ifndef _PAM_ISA + #define _PAM_ISA "." + #endif + +-static int _pam_assemble_line(FILE *f, char *buf, int buf_len); ++struct line_buffer { ++ char *assembled; ++ char *chunk; ++ size_t chunk_size; ++ size_t len; ++ size_t size; ++}; ++ ++static void _pam_buffer_init(struct line_buffer *buffer); ++ ++static int _pam_assemble_line(FILE *f, struct line_buffer *buf); + + static void _pam_free_handlers_aux(struct handler **hp); + + static int _pam_add_handler(pam_handle_t *pamh + , int must_fail, int other, int stack_level, int type + , int *actions, const char *mod_path +- , int argc, char **argv, int argvlen); ++ , int argc, char **argv, size_t argvlen); + + /* Values for module type */ + +@@ -58,12 +67,15 @@ static int _pam_parse_conf_file(pam_hand + #endif /* PAM_READ_BOTH_CONFS */ + ) + { +- char buf[BUF_SIZE]; ++ struct line_buffer buffer; + int x; /* read a line from the FILE *f ? */ ++ ++ _pam_buffer_init(&buffer); + /* + * read a line from the configuration (FILE *) f + */ +- while ((x = _pam_assemble_line(f, buf, BUF_SIZE)) > 0) { ++ while ((x = _pam_assemble_line(f, &buffer)) > 0) { ++ char *buf = buffer.assembled; + char *tok, *nexttok=NULL; + const char *this_service; + const char *mod_path; +@@ -73,7 +85,7 @@ static int _pam_parse_conf_file(pam_hand + int handler_type = PAM_HT_MODULE; /* regular handler from a module */ + int argc; + char **argv; +- int argvlen; ++ size_t argvlen; + + D(("_pam_init_handler: LINE: %s", buf)); + if (known_service != NULL) { +@@ -232,10 +244,11 @@ static int _pam_parse_conf_file(pam_hand + if (nexttok != NULL) { + D(("list: %s",nexttok)); + argvlen = _pam_mkargv(nexttok, &argv, &argc); +- D(("argvlen = %d",argvlen)); ++ D(("argvlen = %zu",argvlen)); + } else { /* there are no arguments so fix by hand */ + D(("_pam_init_handlers: empty argument list")); +- argvlen = argc = 0; ++ argvlen = 0; ++ argc = 0; + argv = NULL; + } + +@@ -548,88 +561,243 @@ int _pam_init_handlers(pam_handle_t *pam + return PAM_SUCCESS; + } + ++static int _pam_buffer_add(struct line_buffer *buffer, char *start, char *end) ++{ ++ size_t len = end - start; ++ ++ D(("assembled: [%zu/%zu] '%s', adding [%zu] '%s'", ++ buffer->len, buffer->size, ++ buffer->assembled == NULL ? "" : buffer->assembled, len, start)); ++ ++ if (start == end) ++ return 0; ++ ++ if (buffer->assembled == NULL && buffer->chunk == start) { ++ /* no extra allocation needed, just move chunk to assembled */ ++ buffer->assembled = buffer->chunk; ++ buffer->len = len; ++ buffer->size = buffer->chunk_size; ++ ++ buffer->chunk = NULL; ++ buffer->chunk_size = 0; ++ ++ D(("exiting with quick exchange")); ++ return 0; ++ } ++ ++ if (buffer->len + len + 1 > buffer->size) { ++ size_t size; ++ char *p; ++ ++ size = buffer->len + len + 1; ++ if ((p = realloc(buffer->assembled, size)) == NULL) ++ return -1; ++ ++ buffer->assembled = p; ++ buffer->size = size; ++ } ++ ++ memcpy(buffer->assembled + buffer->len, start, len); ++ buffer->len += len; ++ buffer->assembled[buffer->len] = '\0'; ++ ++ D(("exiting")); ++ return 0; ++} ++ ++static inline int _pam_buffer_add_eol(struct line_buffer *buffer, ++ char *start, char *end) ++{ ++ if (buffer->assembled != NULL || (*start != '\0' && *start != '\n')) ++ return _pam_buffer_add(buffer, start, end); ++ return 0; ++} ++ ++static void _pam_buffer_clear(struct line_buffer *buffer) ++{ ++ _pam_drop(buffer->assembled); ++ _pam_drop(buffer->chunk); ++ buffer->chunk_size = 0; ++ buffer->len = 0; ++ buffer->size = 0; ++} ++ ++static void _pam_buffer_init(struct line_buffer *buffer) ++{ ++ buffer->assembled = NULL; ++ buffer->chunk = NULL; ++ _pam_buffer_clear(buffer); ++} ++ ++static void _pam_buffer_purge(struct line_buffer *buffer) ++{ ++ _pam_drop(buffer->chunk); ++ buffer->chunk_size = 0; ++} ++ ++static void _pam_buffer_shift(struct line_buffer *buffer) ++{ ++ if (buffer->assembled == NULL) ++ return; ++ ++ _pam_buffer_purge(buffer); ++ buffer->chunk = buffer->assembled; ++ buffer->chunk_size = buffer->size; ++ ++ buffer->assembled = NULL; ++ buffer->size = 0; ++ buffer->len = 0; ++} ++ ++static inline int _pam_buffer_valid(struct line_buffer *buffer) ++{ ++ return buffer->assembled != NULL && *buffer->assembled != '\0'; ++} ++ + /* +- * This is where we read a line of the PAM config file. The line may be +- * preceeded by lines of comments and also extended with "\\\n" ++ * Trim string to relevant parts of a configuration line. ++ * ++ * Preceding whitespaces are skipped and comment (#) marks the end of ++ * configuration line. ++ * ++ * Returns start of configuration line. + */ ++static inline char *_pam_str_trim(char *str) ++{ ++ /* skip leading spaces */ ++ str += strspn(str, " \t"); ++ /* ++ * we are only interested in characters before the first '#' ++ * character ++ */ ++ str[strcspn(str, "#")] = '\0'; + +-static int _pam_assemble_line(FILE *f, char *buffer, int buf_len) ++ return str; ++} ++ ++/* ++ * Remove escaped newline from end of string. ++ * ++ * Configuration lines may span across multiple lines in a file ++ * by ending a line with a backslash (\). ++ * ++ * If an escaped newline is encountered, the backslash will be ++ * replaced with a blank ' ' and the newline itself removed. ++ * Then the variable "end" will point to the new end of line. ++ * ++ * Returns 0 if escaped newline was found and replaced, 1 otherwise. ++ */ ++static inline int _pam_str_unescnl(char *start, char **end) + { +- char *p = buffer; +- char *endp = buffer + buf_len; +- char *s, *os; +- int used = 0; ++ int ret = 1; ++ char *p = *end; + +- /* loop broken with a 'break' when a non-'\\n' ended line is read */ ++ /* ++ * Check for backslash by scanning back from the end of ++ * the entered line, the '\n' should be included since ++ * normally a line is terminated with this character. ++ */ ++ while (p > start && ((*--p == ' ') || (*p == '\t') || (*p == '\n'))) ++ ; ++ if (*p == '\\') { ++ *p++ = ' '; /* replace backslash with ' ' */ ++ *p = '\0'; /* truncate the line here */ ++ *end = p; ++ ret = 0; ++ } + +- D(("called.")); +- for (;;) { +- if (p >= endp) { +- /* Overflow */ +- D(("_pam_assemble_line: overflow")); +- return -1; +- } +- if (fgets(p, endp - p, f) == NULL) { +- if (used) { +- /* Incomplete read */ +- return -1; +- } else { +- /* EOF */ +- return 0; +- } +- } ++ return ret; ++} + +- /* skip leading spaces --- line may be blank */ ++/* ++ * Prepare line from file for configuration line parsing. ++ * ++ * A configuration line may span across multiple lines in a file. ++ * Remove comments and skip preceding whitespaces. ++ * ++ * Returns 0 if line spans across multiple lines, 1 if ++ * end of line is encountered. ++ */ ++static inline int _pam_str_prepare(char *line, ssize_t len, ++ char **start, char **end) ++{ ++ int ret; + +- s = p + strspn(p, " \n\t"); +- if (*s && (*s != '#')) { +- os = s; ++ *start = line; ++ *end = line + len; + +- /* +- * we are only interested in characters before the first '#' +- * character +- */ ++ ret = _pam_str_unescnl(*start, end) || strchr(*start, '#') != NULL; + +- while (*s && *s != '#') +- ++s; +- if (*s == '#') { +- *s = '\0'; +- used += strlen(os); +- break; /* the line has been read */ +- } ++ *start = _pam_str_trim(*start); ++ ++ return ret; ++} ++ ++/* ++ * This is where we read a line of the PAM config file. The line may be ++ * preceded by lines of comments and also extended with "\\\n" ++ * ++ * Returns 0 on EOF, 1 on successful line parsing, or -1 on error. ++ */ ++ ++static int _pam_assemble_line(FILE *f, struct line_buffer *buffer) ++{ ++ int ret = 0; ++ ++ /* loop broken with a 'break' when a non-'\\n' ended line is read */ + +- s = os; ++ D(("called.")); + +- /* +- * Check for backslash by scanning back from the end of +- * the entered line, the '\n' has been included since +- * normally a line is terminated with this +- * character. fgets() should only return one though! +- */ ++ _pam_buffer_shift(buffer); + +- s += strlen(s); +- while (s > os && ((*--s == ' ') || (*s == '\t') +- || (*s == '\n'))); ++ for (;;) { ++ char *start, *end; ++ ssize_t n; ++ int eol; + +- /* check if it ends with a backslash */ +- if (*s == '\\') { +- *s++ = ' '; /* replace backslash with ' ' */ +- *s = '\0'; /* truncate the line here */ +- used += strlen(os); +- p = s; /* there is more ... */ ++ if ((n = getline(&buffer->chunk, &buffer->chunk_size, f)) == -1) { ++ if (ret) { ++ /* Incomplete read */ ++ ret = -1; + } else { +- /* End of the line! */ +- used += strlen(os); +- break; /* this is the complete line */ ++ /* EOF */ ++ ret = 0; + } ++ break; ++ } ++ ++ eol = _pam_str_prepare(buffer->chunk, n, &start, &end); + ++ if (eol) { ++ if (_pam_buffer_add_eol(buffer, start, end)) { ++ ret = -1; ++ break; ++ } ++ if (_pam_buffer_valid(buffer)) { ++ /* Successfully parsed a line */ ++ ret = 1; ++ break; ++ } ++ /* Start parsing next line */ ++ _pam_buffer_shift(buffer); ++ ret = 0; + } else { +- /* Nothing in this line */ +- /* Don't move p */ ++ /* Configuration line spans across multiple lines in file */ ++ if (_pam_buffer_add(buffer, start, end)) { ++ ret = -1; ++ break; ++ } ++ /* Keep parsing line */ ++ ret = 1; + } + } + +- return used; ++ if (ret == 1) ++ _pam_buffer_purge(buffer); ++ else ++ _pam_buffer_clear(buffer); ++ ++ return ret; + } + + static char * +@@ -761,7 +929,7 @@ _pam_load_module(pam_handle_t *pamh, con + int _pam_add_handler(pam_handle_t *pamh + , int handler_type, int other, int stack_level, int type + , int *actions, const char *mod_path +- , int argc, char **argv, int argvlen) ++ , int argc, char **argv, size_t argvlen) + { + struct loaded_module *mod = NULL; + struct handler **handler_p; +diff -up Linux-PAM-1.3.1/libpam/pam_misc.c.libpam-support-long-lines Linux-PAM-1.3.1/libpam/pam_misc.c +--- Linux-PAM-1.3.1/libpam/pam_misc.c.libpam-support-long-lines 2017-02-10 11:10:15.000000000 +0100 ++++ Linux-PAM-1.3.1/libpam/pam_misc.c 2024-11-04 14:47:31.147672755 +0100 +@@ -39,6 +39,8 @@ + + #include + #include ++#include ++#include + #include + #include + #include +@@ -163,60 +165,55 @@ char *_pam_memdup(const char *x, int len + /* Generate argv, argc from s */ + /* caller must free(argv) */ + +-int _pam_mkargv(char *s, char ***argv, int *argc) ++size_t _pam_mkargv(const char *s, char ***argv, int *argc) + { +- int l; +- int argvlen = 0; +- char *sbuf, *sbuf_start; ++ size_t l; ++ size_t argvlen = 0; + char **our_argv = NULL; +- char **argvbuf; +- char *argvbufp; +-#ifdef PAM_DEBUG +- int count=0; +-#endif + +- D(("_pam_mkargv called: %s",s)); ++ D(("called: %s",s)); + + *argc = 0; + + l = strlen(s); +- if (l) { +- if ((sbuf = sbuf_start = _pam_strdup(s)) == NULL) { +- pam_syslog(NULL, LOG_CRIT, +- "pam_mkargv: null returned by _pam_strdup"); +- D(("arg NULL")); ++ if (l && l < SIZE_MAX / (sizeof(char) + sizeof(char *))) { ++ char **argvbuf; ++ /* Overkill on the malloc, but not large */ ++ argvlen = (l + 1) * (sizeof(char) + sizeof(char *)); ++ if ((our_argv = argvbuf = malloc(argvlen)) == NULL) { ++ pam_syslog(NULL, LOG_CRIT, "pam_mkargv: null returned by malloc"); ++ argvlen = 0; + } else { +- /* Overkill on the malloc, but not large */ +- argvlen = (l + 1) * ((sizeof(char)) + sizeof(char *)); +- if ((our_argv = argvbuf = malloc(argvlen)) == NULL) { +- pam_syslog(NULL, LOG_CRIT, +- "pam_mkargv: null returned by malloc"); +- } else { +- char *tmp=NULL; +- +- argvbufp = (char *) argvbuf + (l * sizeof(char *)); +- D(("[%s]",sbuf)); +- while ((sbuf = _pam_StrTok(sbuf, " \n\t", &tmp))) { +- D(("arg #%d",++count)); +- D(("->[%s]",sbuf)); +- strcpy(argvbufp, sbuf); +- D(("copied token")); +- *argvbuf = argvbufp; +- argvbufp += strlen(argvbufp) + 1; +- D(("stepped in argvbufp")); +- (*argc)++; +- argvbuf++; +- sbuf = NULL; +- D(("loop again?")); ++ char *argvbufp; ++ char *tmp=NULL; ++ char *tok; ++#ifdef PAM_DEBUG ++ unsigned count=0; ++#endif ++ argvbufp = (char *) argvbuf + (l * sizeof(char *)); ++ strcpy(argvbufp, s); ++ D(("[%s]",argvbufp)); ++ while ((tok = _pam_StrTok(argvbufp, " \n\t", &tmp))) { ++ D(("arg #%u",++count)); ++ D(("->[%s]",tok)); ++ *argvbuf++ = tok; ++ if (*argc == INT_MAX) { ++ pam_syslog(NULL, LOG_CRIT, ++ "pam_mkargv: too many arguments"); ++ argvlen = 0; ++ _pam_drop(our_argv); ++ break; + } ++ (*argc)++; ++ argvbufp = NULL; ++ D(("loop again?")); + } +- _pam_drop(sbuf_start); + } + } + + *argv = our_argv; + +- D(("_pam_mkargv returned")); ++ D(("exiting")); + + return(argvlen); + } +diff -up Linux-PAM-1.3.1/libpam/pam_private.h.libpam-support-long-lines Linux-PAM-1.3.1/libpam/pam_private.h +--- Linux-PAM-1.3.1/libpam/pam_private.h.libpam-support-long-lines 2024-11-04 13:17:27.404991868 +0100 ++++ Linux-PAM-1.3.1/libpam/pam_private.h 2024-11-04 14:51:31.654635328 +0100 +@@ -16,6 +16,7 @@ + + #include "config.h" + ++#include + #include + + #include +@@ -266,7 +267,7 @@ char *_pam_strdup(const char *s); + + char *_pam_memdup(const char *s, int len); + +-int _pam_mkargv(char *s, char ***argv, int *argc); ++size_t _pam_mkargv(const char *s, char ***argv, int *argc); + + void _pam_sanitize(pam_handle_t *pamh); + +diff -up Linux-PAM-1.3.1/modules/pam_exec/pam_exec.c.libpam-support-long-lines Linux-PAM-1.3.1/modules/pam_exec/pam_exec.c +--- Linux-PAM-1.3.1/modules/pam_exec/pam_exec.c.libpam-support-long-lines 2017-02-10 11:10:15.000000000 +0100 ++++ Linux-PAM-1.3.1/modules/pam_exec/pam_exec.c 2024-11-04 13:17:27.434991946 +0100 +@@ -408,7 +408,7 @@ call_exec (const char *pam_type, pam_han + _exit (err); + } + +- arggv = calloc (argc + 4, sizeof (char *)); ++ arggv = calloc ((size_t) argc + 1, sizeof (char *)); + if (arggv == NULL) + _exit (ENOMEM); + +diff -up Linux-PAM-1.3.1/modules/pam_filter/pam_filter.c.libpam-support-long-lines Linux-PAM-1.3.1/modules/pam_filter/pam_filter.c +--- Linux-PAM-1.3.1/modules/pam_filter/pam_filter.c.libpam-support-long-lines 2017-02-10 11:10:15.000000000 +0100 ++++ Linux-PAM-1.3.1/modules/pam_filter/pam_filter.c 2024-11-04 13:17:27.434991946 +0100 +@@ -101,7 +101,8 @@ static int process_args(pam_handle_t *pa + char **levp; + const char *user = NULL; + const void *tmp; +- int i,size, retval; ++ int i, retval; ++ size_t size; + + *filtername = *++argv; + if (ctrl & FILTER_DEBUG) { +diff -up Linux-PAM-1.3.1/modules/pam_motd/pam_motd.c.libpam-support-long-lines Linux-PAM-1.3.1/modules/pam_motd/pam_motd.c +--- Linux-PAM-1.3.1/modules/pam_motd/pam_motd.c.libpam-support-long-lines 2024-11-04 13:17:27.423991918 +0100 ++++ Linux-PAM-1.3.1/modules/pam_motd/pam_motd.c 2024-11-04 13:17:27.434991946 +0100 +@@ -83,14 +83,14 @@ static void try_to_display_fd(pam_handle + * Returns 0 in case of error, 1 in case of success. + */ + static int pam_split_string(const pam_handle_t *pamh, char *arg, char delim, +- char ***out_arg_split, unsigned int *out_num_strs) ++ char ***out_arg_split, size_t *out_num_strs) + { + char *arg_extracted = NULL; + const char *arg_ptr = arg; + char **arg_split = NULL; + char delim_str[2]; +- unsigned int i = 0; +- unsigned int num_strs = 0; ++ size_t i = 0; ++ size_t num_strs = 0; + int retval = 0; + + delim_str[0] = delim; +@@ -184,13 +184,13 @@ static int filter_dirents(const struct d + } + + static void try_to_display_directories_with_overrides(pam_handle_t *pamh, +- char **motd_dir_path_split, unsigned int num_motd_dirs, int report_missing) ++ char **motd_dir_path_split, size_t num_motd_dirs, int report_missing) + { + struct dirent ***dirscans = NULL; + unsigned int *dirscans_sizes = NULL; + unsigned int dirscans_size_total = 0; + char **dirnames_all = NULL; +- unsigned int i; ++ size_t i; + int i_dirnames = 0; + + if (pamh == NULL || motd_dir_path_split == NULL) { +@@ -302,11 +302,11 @@ int pam_sm_open_session(pam_handle_t *pa + int retval = PAM_IGNORE; + const char *motd_path = NULL; + char *motd_path_copy = NULL; +- unsigned int num_motd_paths = 0; ++ size_t num_motd_paths = 0; + char **motd_path_split = NULL; + const char *motd_dir_path = NULL; + char *motd_dir_path_copy = NULL; +- unsigned int num_motd_dir_paths = 0; ++ size_t num_motd_dir_paths = 0; + char **motd_dir_path_split = NULL; + int report_missing; + diff --git a/SOURCES/pam-1.3.1-pam-access-local.patch b/SOURCES/pam-1.3.1-pam-access-local.patch new file mode 100644 index 0000000..2b82d49 --- /dev/null +++ b/SOURCES/pam-1.3.1-pam-access-local.patch @@ -0,0 +1,215 @@ +From 08992030c56c940c0707ccbc442b1c325aa01e6d Mon Sep 17 00:00:00 2001 +From: Tomas Mraz +Date: Tue, 6 Apr 2021 12:27:38 +0200 +Subject: [PATCH] pam_access: clean up the remote host matching code + +* modules/pam_access/pam_access.c (from_match): Split out remote_match() + function and avoid calling it when matching against LOCAL keyword. + There is also no point in doing domain match against TTY or SERVICE. +--- + modules/pam_access/pam_access.c | 44 +++++++++++++++++++++------------ + 1 file changed, 28 insertions(+), 16 deletions(-) + +diff --git a/modules/pam_access/pam_access.c b/modules/pam_access/pam_access.c +index 98848c54..277192b9 100644 +--- a/modules/pam_access/pam_access.c ++++ b/modules/pam_access/pam_access.c +@@ -160,6 +160,7 @@ static int list_match (pam_handle_t *, char *, char *, struct login_info *, + static int user_match (pam_handle_t *, char *, struct login_info *); + static int group_match (pam_handle_t *, const char *, const char *, int); + static int from_match (pam_handle_t *, char *, struct login_info *); ++static int remote_match (pam_handle_t *, char *, struct login_info *); + static int string_match (pam_handle_t *, const char *, const char *, int); + static int network_netmask_match (pam_handle_t *, const char *, const char *, struct login_info *); + +@@ -589,11 +590,9 @@ group_match (pam_handle_t *pamh, const char *tok, const char* usr, + /* from_match - match a host or tty against a list of tokens */ + + static int +-from_match (pam_handle_t *pamh UNUSED, char *tok, struct login_info *item) ++from_match (pam_handle_t *pamh, char *tok, struct login_info *item) + { + const char *string = item->from; +- int tok_len; +- int str_len; + int rv; + + if (item->debug) +@@ -616,14 +615,29 @@ from_match (pam_handle_t *pamh UNUSED, char *tok, struct login_info *item) + } else if ((rv = string_match(pamh, tok, string, item->debug)) != NO) { + /* ALL or exact match */ + return rv; +- } else if (tok[0] == '.') { /* domain: match last fields */ +- if ((str_len = strlen(string)) > (tok_len = strlen(tok)) +- && strcasecmp(tok, string + str_len - tok_len) == 0) +- return (YES); +- } else if (item->from_remote_host == 0) { /* local: no PAM_RHOSTS */ +- if (strcasecmp(tok, "LOCAL") == 0) +- return (YES); +- } else if (tok[(tok_len = strlen(tok)) - 1] == '.') { ++ } else if (strcasecmp(tok, "LOCAL") == 0) { ++ /* LOCAL matches only local accesses */ ++ if (!item->from_remote_host) ++ return YES; ++ return NO; ++ } else if (item->from_remote_host) { ++ return remote_match(pamh, tok, item); ++ } ++ return NO; ++} ++ ++static int ++remote_match (pam_handle_t *pamh, char *tok, struct login_info *item) ++{ ++ const char *string = item->from; ++ size_t tok_len = strlen(tok); ++ size_t str_len; ++ ++ if (tok[0] == '.') { /* domain: match last fields */ ++ if ((str_len = strlen(string)) > tok_len ++ && strcasecmp(tok, string + str_len - tok_len) == 0) ++ return YES; ++ } else if (tok[tok_len - 1] == '.') { + struct addrinfo hint; + + memset (&hint, '\0', sizeof (hint)); +@@ -661,13 +675,11 @@ from_match (pam_handle_t *pamh UNUSED, char *tok, struct login_info *item) + runp = runp->ai_next; + } + } +- } else { +- /* Assume network/netmask with a IP of a host. */ +- if (network_netmask_match(pamh, tok, string, item)) +- return YES; ++ return NO; + } + +- return NO; ++ /* Assume network/netmask with an IP of a host. */ ++ return network_netmask_match(pamh, tok, string, item); + } + + /* string_match - match a string against one token */ +-- +2.47.0 + + +From ecaaf4456e5aeacae1acdb1775bb5aadd3b19e13 Mon Sep 17 00:00:00 2001 +From: Iker Pedrosa +Date: Wed, 16 Oct 2024 12:41:09 +0200 +Subject: [PATCH 1/2] pam_access: always match local address + +* modules/pam_access/pam_access.c: match the local address regardless of + the IP version in use. + +In some circumstances the `localhost` may be translated to IPv4 or IPv6, +but the configuration file only indicated the address for one of the two +versions. Since the originating value is set in `PAM_RHOST` and PAM has +no control over it, let's match the local addresses regardless of the IP +version in use. + +Resolves: https://issues.redhat.com/browse/RHEL-23018 +Signed-off-by: Iker Pedrosa +--- + modules/pam_access/pam_access.c | 30 ++++++++++++++++++++++++++++-- + 1 file changed, 28 insertions(+), 2 deletions(-) + +diff --git a/modules/pam_access/pam_access.c b/modules/pam_access/pam_access.c +index bfbc6d57..48e7c7e9 100644 +--- a/modules/pam_access/pam_access.c ++++ b/modules/pam_access/pam_access.c +@@ -306,6 +306,23 @@ isipaddr (const char *string, int *addr_type, + return is_ip; + } + ++/* is_local_addr - checks if the IP address is local */ ++static int ++is_local_addr (const char *string, int addr_type) ++{ ++ if (addr_type == AF_INET) { ++ if (strcmp(string, "127.0.0.1") == 0) { ++ return YES; ++ } ++ } else if (addr_type == AF_INET6) { ++ if (strcmp(string, "::1") == 0) { ++ return YES; ++ } ++ } ++ ++ return NO; ++} ++ + + /* are_addresses_equal - translate IP address strings to real IP + * addresses and compare them to find out if they are equal. +@@ -327,9 +344,18 @@ are_addresses_equal (const char *ipaddr0, const char *ipaddr1, + if (isipaddr (ipaddr1, &addr_type1, &addr1) == NO) + return NO; + +- if (addr_type0 != addr_type1) +- /* different address types */ ++ if (addr_type0 != addr_type1) { ++ /* different address types, but there is still a possibility that they are ++ * both local addresses ++ */ ++ int local1 = is_local_addr(ipaddr0, addr_type0); ++ int local2 = is_local_addr(ipaddr1, addr_type1); ++ ++ if (local1 == YES && local2 == YES) ++ return YES; ++ + return NO; ++ } + + if (netmask != NULL) { + /* Got a netmask, so normalize addresses? */ +-- +2.47.0 + + +From 641dfd1084508c63f3590e93a35b80ffc50774e5 Mon Sep 17 00:00:00 2001 +From: Iker Pedrosa +Date: Fri, 18 Oct 2024 10:27:07 +0200 +Subject: [PATCH 2/2] pam_access: clarify `LOCAL` keyword behaviour + +* modules/pam_access/access.conf.5.xml: `LOCAL` keyword behaviour + explanation was focused on the development internals. Let's clarify it + by rephrasing it to something a sysadmin can understand. + +Resolves: https://issues.redhat.com/browse/RHEL-39943 +Signed-off-by: Iker Pedrosa +--- + modules/pam_access/access.conf.5.xml | 17 ++++++----------- + 1 file changed, 6 insertions(+), 11 deletions(-) + +diff --git a/modules/pam_access/access.conf.5.xml b/modules/pam_access/access.conf.5.xml +index 35a1a8fe..0b93db00 100644 +--- a/modules/pam_access/access.conf.5.xml ++++ b/modules/pam_access/access.conf.5.xml +@@ -79,17 +79,12 @@ + with network mask (where network mask can be a decimal number or an + internet address also), ALL (which always matches) + or LOCAL. The LOCAL +- keyword matches if and only if +- pam_get_item3, +- when called with an item_type of +- PAM_RHOST, returns NULL or an +- empty string (and therefore the +- origins field is compared against the +- return value of +- pam_get_item3 +- called with an item_type of +- PAM_TTY or, absent that, +- PAM_SERVICE). ++ keyword matches when the user connects without a network ++ connection (e.g., su, ++ login). A connection through the loopback ++ device (e.g., ssh user@localhost) is ++ considered a network connection, and thus, the ++ LOCAL keyword does not match. + + + +-- +2.47.0 + diff --git a/SOURCES/pam-1.3.1-pam-access-resolve-ip.patch b/SOURCES/pam-1.3.1-pam-access-resolve-ip.patch new file mode 100644 index 0000000..27cbdf5 --- /dev/null +++ b/SOURCES/pam-1.3.1-pam-access-resolve-ip.patch @@ -0,0 +1,211 @@ +diff -up Linux-PAM-1.5.1/modules/pam_access/access.conf.5.xml.pam-access-resolve-ip Linux-PAM-1.5.1/modules/pam_access/access.conf.5.xml +--- Linux-PAM-1.5.1/modules/pam_access/access.conf.5.xml.pam-access-resolve-ip 2020-11-25 17:57:02.000000000 +0100 ++++ Linux-PAM-1.5.1/modules/pam_access/access.conf.5.xml 2024-11-21 10:04:58.553127026 +0100 +@@ -226,6 +226,14 @@ + item and the line will be most probably ignored. For this reason, it is not + recommended to put spaces around the ':' characters. + ++ ++ An IPv6 link local host address must contain the interface ++ identifier. IPv6 link local network/netmask is not supported. ++ ++ ++ Hostnames should be written as Fully-Qualified Host Name (FQHN) to avoid ++ confusion with device names or PAM service names. ++ + + + +diff -up Linux-PAM-1.5.1/modules/pam_access/pam_access.8.xml.pam-access-resolve-ip Linux-PAM-1.5.1/modules/pam_access/pam_access.8.xml +--- Linux-PAM-1.5.1/modules/pam_access/pam_access.8.xml.pam-access-resolve-ip 2020-11-25 17:57:02.000000000 +0100 ++++ Linux-PAM-1.5.1/modules/pam_access/pam_access.8.xml 2024-11-21 10:04:58.553127026 +0100 +@@ -25,11 +25,14 @@ + + debug + ++ ++ noaudit ++ + + nodefgroup + +- +- noaudit ++ ++ nodns + + + accessfile=file +@@ -114,7 +117,46 @@ + + + +- ++ nodefgroup ++ ++ ++ ++ User tokens which are not enclosed in parentheses will not be ++ matched against the group database. The backwards compatible default is ++ to try the group database match even for tokens not enclosed ++ in parentheses. ++ ++ ++ ++ ++ ++ ++ nodns ++ ++ ++ ++ Do not try to resolve tokens as hostnames, only IPv4 and IPv6 ++ addresses will be resolved. Which means to allow login from a ++ remote host, the IP addresses need to be specified in access.conf. ++ ++ ++ ++ ++ ++ ++ quiet_log ++ ++ ++ ++ Do not log denials with ++ syslog3. ++ ++ ++ ++ ++ ++ ++ fieldsep=separators + + + +@@ -152,20 +194,6 @@ + + + +- +- +- +- +- +- +- +- User tokens which are not enclosed in parentheses will not be +- matched against the group database. The backwards compatible default is +- to try the group database match even for tokens not enclosed +- in parentheses. +- +- +- + + + +diff -up Linux-PAM-1.5.1/modules/pam_access/pam_access.c.pam-access-resolve-ip Linux-PAM-1.5.1/modules/pam_access/pam_access.c +--- Linux-PAM-1.5.1/modules/pam_access/pam_access.c.pam-access-resolve-ip 2024-11-21 10:04:58.547127010 +0100 ++++ Linux-PAM-1.5.1/modules/pam_access/pam_access.c 2024-11-21 10:04:58.553127026 +0100 +@@ -92,6 +92,7 @@ struct login_info { + int debug; /* Print debugging messages. */ + int only_new_group_syntax; /* Only allow group entries of the form "(xyz)" */ + int noaudit; /* Do not audit denials */ ++ int nodns; /* Do not try to resolve tokens as hostnames */ + const char *fs; /* field separator */ + const char *sep; /* list-element separator */ + int from_remote_host; /* If PAM_RHOST was used for from */ +@@ -143,6 +144,8 @@ parse_args(pam_handle_t *pamh, struct lo + loginfo->only_new_group_syntax = YES; + } else if (strcmp (argv[i], "noaudit") == 0) { + loginfo->noaudit = YES; ++ } else if (strcmp (argv[i], "nodns") == 0) { ++ loginfo->nodns = YES; + } else { + pam_syslog(pamh, LOG_ERR, "unrecognized option [%s]", argv[i]); + } +@@ -700,6 +703,39 @@ string_match (pam_handle_t *pamh, const + } + + ++static int ++is_device (pam_handle_t *pamh, const char *tok) ++{ ++ struct stat st; ++ const char *dev = "/dev/"; ++ char *devname; ++ ++ devname = malloc (strlen(dev) + strlen (tok) + 1); ++ if (devname == NULL) { ++ pam_syslog(pamh, LOG_ERR, "Cannot allocate memory for device name: %m"); ++ /* ++ * We should return an error and abort, but pam_access has no good ++ * error handling. ++ */ ++ return NO; ++ } ++ ++ char *cp = stpcpy (devname, dev); ++ strcpy (cp, tok); ++ ++ if (lstat(devname, &st) != 0) ++ { ++ free (devname); ++ return NO; ++ } ++ free (devname); ++ ++ if (S_ISCHR(st.st_mode)) ++ return YES; ++ ++ return NO; ++} ++ + /* network_netmask_match - match a string against one token + * where string is a hostname or ip (v4,v6) address and tok + * represents either a hostname, a single ip (v4,v6) address +@@ -761,10 +797,42 @@ network_netmask_match (pam_handle_t *pam + return NO; + } + } ++ else if (isipaddr(tok, NULL, NULL) == YES) ++ { ++ if (getaddrinfo (tok, NULL, NULL, &ai) != 0) ++ { ++ if (item->debug) ++ pam_syslog(pamh, LOG_DEBUG, "cannot resolve IP address \"%s\"", tok); ++ ++ return NO; ++ } ++ netmask_ptr = NULL; ++ } ++ else if (item->nodns) ++ { ++ /* Only hostnames are left, which we would need to resolve via DNS */ ++ return NO; ++ } + else + { ++ /* Bail out on X11 Display entries and ttys. */ ++ if (tok[0] == ':') ++ { ++ if (item->debug) ++ pam_syslog (pamh, LOG_DEBUG, ++ "network_netmask_match: tok=%s is X11 display", tok); ++ return NO; ++ } ++ if (is_device (pamh, tok)) ++ { ++ if (item->debug) ++ pam_syslog (pamh, LOG_DEBUG, ++ "network_netmask_match: tok=%s is a TTY", tok); ++ return NO; ++ } ++ + /* +- * It is either an IP address or a hostname. ++ * It is most likely a hostname. + * Let getaddrinfo sort everything out + */ + if (getaddrinfo (tok, NULL, NULL, &ai) != 0) diff --git a/SOURCES/pam-1.3.1-pam-unix-shadow-password.patch b/SOURCES/pam-1.3.1-pam-unix-shadow-password.patch new file mode 100644 index 0000000..bf183e5 --- /dev/null +++ b/SOURCES/pam-1.3.1-pam-unix-shadow-password.patch @@ -0,0 +1,47 @@ +diff -up Linux-PAM-1.3.1/modules/pam_unix/passverify.c.pam-unix-shadow-password Linux-PAM-1.3.1/modules/pam_unix/passverify.c +--- Linux-PAM-1.3.1/modules/pam_unix/passverify.c.pam-unix-shadow-password 2024-11-05 13:02:14.637785962 +0100 ++++ Linux-PAM-1.3.1/modules/pam_unix/passverify.c 2024-11-05 13:02:14.643785975 +0100 +@@ -73,9 +73,13 @@ verify_pwd_hash(const char *p, char *has + + strip_hpux_aging(hash); + hash_len = strlen(hash); +- if (!hash_len) { ++ ++ if (p && p[0] == '\0' && !nullok) { ++ /* The passed password is empty */ ++ retval = PAM_AUTH_ERR; ++ } else if (!hash_len) { + /* the stored password is NULL */ +- if (nullok) { /* this means we've succeeded */ ++ if (p && p[0] == '\0' && nullok) { /* this means we've succeeded */ + D(("user has empty password - access granted")); + retval = PAM_SUCCESS; + } else { +@@ -192,17 +196,21 @@ PAMH_ARG_DECL(int get_account_info, + return PAM_UNIX_RUN_HELPER; + #endif + } else if (is_pwd_shadowed(*pwd)) { ++#ifdef HELPER_COMPILE + /* +- * ...and shadow password file entry for this user, ++ * shadow password file entry for this user, + * if shadowing is enabled + */ +-#ifndef HELPER_COMPILE +- if (geteuid() || SELINUX_ENABLED) +- return PAM_UNIX_RUN_HELPER; +-#endif +- *spwdent = pam_modutil_getspnam(pamh, name); ++ *spwdent = getspnam(name); + if (*spwdent == NULL || (*spwdent)->sp_pwdp == NULL) + return PAM_AUTHINFO_UNAVAIL; ++#else ++ /* ++ * The helper has to be invoked to deal with ++ * the shadow password file entry. ++ */ ++ return PAM_UNIX_RUN_HELPER; ++#endif + } + } else { + return PAM_USER_UNKNOWN; diff --git a/SPECS/pam.spec b/SPECS/pam.spec index 35f5bcd..ee87fa4 100644 --- a/SPECS/pam.spec +++ b/SPECS/pam.spec @@ -3,7 +3,7 @@ Summary: An extensible library which provides authentication for applications Name: pam Version: 1.3.1 -Release: 34%{?dist} +Release: 36%{?dist} # The library is BSD licensed with option to relicense as GPLv2+ # - this option is redundant as the BSD license allows that anyway. # pam_timestamp, pam_loginuid, and pam_console modules are GPLv2+. @@ -113,6 +113,16 @@ Patch70: pam-1.3.1-namespace-protect-dir.patch # https://github.com/linux-pam/linux-pam/commit/c85513220c1bd3150e39c6277422d29cfa44acc7 # https://github.com/linux-pam/linux-pam/commit/1648734a69c31e9ce834da70144ac9a453296807 Patch71: pam-1.3.1-audit-messages-formatting.patch +# https://github.com/linux-pam/linux-pam/commit/b3020da7da384d769f27a8713257fbe1001878be +# https://github.com/linux-pam/linux-pam/commit/8d0c575336ad301cd14e16ad2fdec6fe621764b8 +Patch72: pam-1.3.1-pam-unix-shadow-password.patch +# https://github.com/linux-pam/linux-pam/commit/08992030c56c940c0707ccbc442b1c325aa01e6d +# https://github.com/linux-pam/linux-pam/commit/641dfd1084508c63f3590e93a35b80ffc50774e5 +Patch73: pam-1.3.1-pam-access-local.patch +# https://github.com/linux-pam/linux-pam/commit/ec1fb9ddc6c252d8c61379e9385ca19c036fcb96 +Patch74: pam-1.3.1-libpam-support-long-lines.patch +# https://github.com/linux-pam/linux-pam/commit/940747f88c16e029b69a74e80a2e94f65cb3e628 +Patch75: pam-1.3.1-pam-access-resolve-ip.patch %define _pamlibdir %{_libdir} %define _moduledir %{_libdir}/security @@ -232,6 +242,10 @@ cp %{SOURCE18} . %patch69 -p1 -b .access-handle-hostnames %patch70 -p1 -b .namespace-protect-dir %patch71 -p1 -b .audit-messages-formatting +%patch72 -p1 -b .pam-unix-shadow-password +%patch73 -p1 -b .pam-access-local +%patch74 -p1 -b .libpam-support-long-lines +%patch75 -p1 -b .pam-access-resolve-ip autoreconf -i @@ -485,6 +499,17 @@ done %doc doc/specs/rfc86.0.txt %changelog +* Mon Nov 25 2024 Iker Pedrosa - 1.3.1-36 +- pam_access: rework resolving of tokens as hostname. + Resolves: CVE-2024-10963 and RHEL-66242 + +* Mon Nov 4 2024 Iker Pedrosa - 1.3.1-35 +- pam_unix: always run the helper to obtain shadow password file entries. + CVE-2024-10041. Resolves: RHEL-62877 +- pam_access: always match local address and clarify LOCAL keyword behaviour. + Resolves: RHEL-23018 +- libpam: support long lines in service files. Resolves: RHEL-5051 + * Thu Apr 4 2024 Iker Pedrosa - 1.3.1-34 - fix formatting of audit messages. Resolves: RHEL-28620