You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
3.1 KiB
103 lines
3.1 KiB
From 548375b2122f83771dc0b8571f16e5b5adabba98 Mon Sep 17 00:00:00 2001
|
|
From: Martin Sehnoutka <msehnout@redhat.com>
|
|
Date: Wed, 7 Sep 2016 10:04:31 +0200
|
|
Subject: [PATCH 07/59] Make filename filters smarter.
|
|
|
|
In the original version vsftpd was not able to prevent
|
|
users from downloading for instance /etc/passwd by
|
|
defining filters such as deny_file=/etc/passwd or /etc*
|
|
or passwd. Example of erroneous behavior:
|
|
230 Login successful.
|
|
Remote system type is UNIX.
|
|
Using binary mode to transfer files.
|
|
ftp> cd /
|
|
250 Directory successfully changed.
|
|
ftp> cd /etc
|
|
550 Permission denied.
|
|
ftp> cd etc
|
|
250 Directory successfully changed.
|
|
ftp> get passwd
|
|
local: passwd remote: passwd
|
|
227 Entering Passive Mode (127,0,0,1,99,251)
|
|
150 Opening BINARY mode data connection for passwd (2813 bytes).
|
|
226 File send OK.
|
|
2813 bytes received in 0.00016 seconds (1.7e+04 Kbytes/s)
|
|
ftp> quit
|
|
221 Goodbye.
|
|
---
|
|
ls.c | 24 +++++++++++++++++++++++-
|
|
str.c | 11 +++++++++++
|
|
str.h | 1 +
|
|
3 files changed, 35 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/ls.c b/ls.c
|
|
index 7e1376d..f489478 100644
|
|
--- a/ls.c
|
|
+++ b/ls.c
|
|
@@ -246,8 +246,30 @@ vsf_filename_passes_filter(const struct mystr* p_filename_str,
|
|
int ret = 0;
|
|
char last_token = 0;
|
|
int must_match_at_current_pos = 1;
|
|
+
|
|
+
|
|
str_copy(&filter_remain_str, p_filter_str);
|
|
- str_copy(&name_remain_str, p_filename_str);
|
|
+
|
|
+ if (!str_isempty (&filter_remain_str) && !str_isempty(p_filename_str)) {
|
|
+ if (str_get_char_at(p_filter_str, 0) == '/') {
|
|
+ if (str_get_char_at(p_filename_str, 0) != '/') {
|
|
+ str_getcwd (&name_remain_str);
|
|
+
|
|
+ if (str_getlen(&name_remain_str) > 1) /* cwd != root dir */
|
|
+ str_append_char (&name_remain_str, '/');
|
|
+
|
|
+ str_append_str (&name_remain_str, p_filename_str);
|
|
+ }
|
|
+ else
|
|
+ str_copy (&name_remain_str, p_filename_str);
|
|
+ } else {
|
|
+ if (str_get_char_at(p_filter_str, 0) != '{')
|
|
+ str_basename (&name_remain_str, p_filename_str);
|
|
+ else
|
|
+ str_copy (&name_remain_str, p_filename_str);
|
|
+ }
|
|
+ } else
|
|
+ str_copy(&name_remain_str, p_filename_str);
|
|
|
|
while (!str_isempty(&filter_remain_str) && *iters < VSFTP_MATCHITERS_MAX)
|
|
{
|
|
diff --git a/str.c b/str.c
|
|
index 6596204..ba4b92a 100644
|
|
--- a/str.c
|
|
+++ b/str.c
|
|
@@ -711,3 +711,14 @@ str_replace_unprintable(struct mystr* p_str, char new_char)
|
|
}
|
|
}
|
|
|
|
+void
|
|
+str_basename (struct mystr* d_str, const struct mystr* path)
|
|
+{
|
|
+ static struct mystr tmp;
|
|
+
|
|
+ str_copy (&tmp, path);
|
|
+ str_split_char_reverse(&tmp, d_str, '/');
|
|
+
|
|
+ if (str_isempty(d_str))
|
|
+ str_copy (d_str, path);
|
|
+}
|
|
diff --git a/str.h b/str.h
|
|
index ab0a9a4..3a21b50 100644
|
|
--- a/str.h
|
|
+++ b/str.h
|
|
@@ -100,6 +100,7 @@ void str_replace_unprintable(struct mystr* p_str, char new_char);
|
|
int str_atoi(const struct mystr* p_str);
|
|
filesize_t str_a_to_filesize_t(const struct mystr* p_str);
|
|
unsigned int str_octal_to_uint(const struct mystr* p_str);
|
|
+void str_basename (struct mystr* d_str, const struct mystr* path);
|
|
|
|
/* PURPOSE: Extract a line of text (delimited by \n or EOF) from a string
|
|
* buffer, starting at character position 'p_pos'. The extracted line will
|
|
--
|
|
2.14.4
|
|
|