.gitignore

@@ -1,4 +1,2 @@
-SOURCES/maxim.key
-SOURCES/mdounin.key
 SOURCES/nginx-1.20.1.tar.gz
-SOURCES/sb.key
+SOURCES/nginx-logo.png

.nginx.metadata

@@ -1,4 +1,2 @@
-fe1bb3869c51a54f28e7e7a2c1d8a790a2ca7789 SOURCES/maxim.key
-145bf87154a2689f7c09a376c11f307012a439de SOURCES/mdounin.key
 6b4ab4eff3c617e133819f43fdfc14708e593a79 SOURCES/nginx-1.20.1.tar.gz
-baa71c22e4e2b67be2a5f4f4df25a99962488f90 SOURCES/sb.key
+e28dd656984cc2894d8124c5278789c656f6a9cb SOURCES/nginx-logo.png

SOURCES/0008-CVE-2023-44487-HTTP-2-per-iteration-stream-handling.patch

@@ -0,0 +1,74 @@
+From b6aa9504cdfb6391d895dcbddc87b9260ea6968c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Lubo=C5=A1=20Uhliarik?= <luhliari@redhat.com>
+Date: Wed, 11 Oct 2023 09:59:23 +0200
+Subject: [PATCH] CVE-2023-44487 - HTTP/2: per-iteration stream handling limit.
+
+To ensure that attempts to flood servers with many streams are detected
+early, a limit of no more than 2 * max_concurrent_streams new streams per one
+event loop iteration was introduced.  This limit is applied even if
+max_concurrent_streams is not yet reached - for example, if corresponding
+streams are handled synchronously or reset.
+
+Further, refused streams are now limited to maximum of max_concurrent_streams
+and 100, similarly to priority_limit initial value, providing some tolerance
+to clients trying to open several streams at the connection start, yet
+low tolerance to flooding attempts.
+---
+ src/http/v2/ngx_http_v2.c | 15 +++++++++++++++
+ src/http/v2/ngx_http_v2.h |  2 ++
+ 2 files changed, 17 insertions(+)
+
+
+diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c
+index 3611a2e..291677a 100644
+--- a/src/http/v2/ngx_http_v2.c
++++ b/src/http/v2/ngx_http_v2.c
+@@ -361,6 +361,7 @@ ngx_http_v2_read_handler(ngx_event_t *rev)
+     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http2 read handler");
+ 
+     h2c->blocked = 1;
++    h2c->new_streams = 0;
+ 
+     if (c->close) {
+         c->close = 0;
+@@ -1320,6 +1321,14 @@ ngx_http_v2_state_headers(ngx_http_v2_connection_t *h2c, u_char *pos,
+         goto rst_stream;
+     }
+ 
++    if (h2c->new_streams++ >= 2 * h2scf->concurrent_streams) {
++        ngx_log_error(NGX_LOG_INFO, h2c->connection->log, 0,
++                      "client sent too many streams at once");
++
++        status = NGX_HTTP_V2_REFUSED_STREAM;
++        goto rst_stream;
++    }
++
+     if (!h2c->settings_ack
+         && !(h2c->state.flags & NGX_HTTP_V2_END_STREAM_FLAG)
+         && h2scf->preread_size < NGX_HTTP_V2_DEFAULT_WINDOW)
+@@ -1385,6 +1394,12 @@ ngx_http_v2_state_headers(ngx_http_v2_connection_t *h2c, u_char *pos,
+ 
+ rst_stream:
+ 
++    if (h2c->refused_streams++ > ngx_max(h2scf->concurrent_streams, 100)) {
++        ngx_log_error(NGX_LOG_INFO, h2c->connection->log, 0,
++                      "client sent too many refused streams");
++        return ngx_http_v2_connection_error(h2c, NGX_HTTP_V2_NO_ERROR);
++    }
++
+     if (ngx_http_v2_send_rst_stream(h2c, h2c->state.sid, status) != NGX_OK) {
+         return ngx_http_v2_connection_error(h2c, NGX_HTTP_V2_INTERNAL_ERROR);
+     }
+diff --git a/src/http/v2/ngx_http_v2.h b/src/http/v2/ngx_http_v2.h
+index 3492297..6a7aaa6 100644
+--- a/src/http/v2/ngx_http_v2.h
++++ b/src/http/v2/ngx_http_v2.h
+@@ -125,6 +125,8 @@ struct ngx_http_v2_connection_s {
+     ngx_uint_t                       processing;
+     ngx_uint_t                       frames;
+     ngx_uint_t                       idle;
++    ngx_uint_t                       new_streams;
++    ngx_uint_t                       refused_streams;
+     ngx_uint_t                       priority_limit;
+ 
+     ngx_uint_t                       pushing;

SOURCES/0009-Optimized-chain-link-usage.patch

@@ -0,0 +1,183 @@
+From f3bcc0bcfb6eda3f4874fe2531d546ba724c518c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Lubo=C5=A1=20Uhliarik?= <luhliari@redhat.com>
+Date: Wed, 12 Jun 2024 12:49:28 +0200
+Subject: [PATCH] Optimized chain link usage
+
+Previously chain links could sometimes be dropped instead of being reused,
+which could result in increased memory consumption during long requests.
+---
+ src/core/ngx_output_chain.c                    | 10 ++++++++--
+ src/http/modules/ngx_http_grpc_module.c        |  5 ++++-
+ .../modules/ngx_http_gunzip_filter_module.c    | 18 ++++++++++++++----
+ src/http/modules/ngx_http_gzip_filter_module.c | 10 +++++++---
+ src/http/modules/ngx_http_ssi_filter_module.c  |  8 ++++++--
+ src/http/modules/ngx_http_sub_filter_module.c  |  8 ++++++--
+ 6 files changed, 45 insertions(+), 14 deletions(-)
+
+diff --git a/src/core/ngx_output_chain.c b/src/core/ngx_output_chain.c
+index 5c3dbe8..4aa1b02 100644
+--- a/src/core/ngx_output_chain.c
++++ b/src/core/ngx_output_chain.c
+@@ -121,7 +121,10 @@ ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in)
+ 
+                 ngx_debug_point();
+ 
+-                ctx->in = ctx->in->next;
++                cl = ctx->in;
++                ctx->in = cl->next;
++
++                ngx_free_chain(ctx->pool, cl);
+ 
+                 continue;
+             }
+@@ -207,7 +210,10 @@ ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in)
+             /* delete the completed buf from the ctx->in chain */
+ 
+             if (ngx_buf_size(ctx->in->buf) == 0) {
+-                ctx->in = ctx->in->next;
++                cl = ctx->in;
++                ctx->in = cl->next;
++
++                ngx_free_chain(ctx->pool, cl);
+             }
+ 
+             cl = ngx_alloc_chain_link(ctx->pool);
+diff --git a/src/http/modules/ngx_http_grpc_module.c b/src/http/modules/ngx_http_grpc_module.c
+index 53bc547..9f13089 100644
+--- a/src/http/modules/ngx_http_grpc_module.c
++++ b/src/http/modules/ngx_http_grpc_module.c
+@@ -1230,7 +1230,7 @@ ngx_http_grpc_body_output_filter(void *data, ngx_chain_t *in)
+     ngx_buf_t              *b;
+     ngx_int_t               rc;
+     ngx_uint_t              next, last;
+-    ngx_chain_t            *cl, *out, **ll;
++    ngx_chain_t            *cl, *out, *ln, **ll;
+     ngx_http_upstream_t    *u;
+     ngx_http_grpc_ctx_t    *ctx;
+     ngx_http_grpc_frame_t  *f;
+@@ -1458,7 +1458,10 @@ ngx_http_grpc_body_output_filter(void *data, ngx_chain_t *in)
+             last = 1;
+         }
+ 
++        ln = in;
+         in = in->next;
++
++        ngx_free_chain(r->pool, ln);
+     }
+ 
+     ctx->in = in;
+diff --git a/src/http/modules/ngx_http_gunzip_filter_module.c b/src/http/modules/ngx_http_gunzip_filter_module.c
+index c1341f5..5d170a1 100644
+--- a/src/http/modules/ngx_http_gunzip_filter_module.c
++++ b/src/http/modules/ngx_http_gunzip_filter_module.c
+@@ -333,6 +333,8 @@ static ngx_int_t
+ ngx_http_gunzip_filter_add_data(ngx_http_request_t *r,
+     ngx_http_gunzip_ctx_t *ctx)
+ {
++    ngx_chain_t  *cl;
++
+     if (ctx->zstream.avail_in || ctx->flush != Z_NO_FLUSH || ctx->redo) {
+         return NGX_OK;
+     }
+@@ -344,8 +346,11 @@ ngx_http_gunzip_filter_add_data(ngx_http_request_t *r,
+         return NGX_DECLINED;
+     }
+ 
+-    ctx->in_buf = ctx->in->buf;
+-    ctx->in = ctx->in->next;
++    cl = ctx->in;
++    ctx->in_buf = cl->buf;
++    ctx->in = cl->next;
++
++    ngx_free_chain(r->pool, cl);
+ 
+     ctx->zstream.next_in = ctx->in_buf->pos;
+     ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos;
+@@ -374,6 +379,7 @@ static ngx_int_t
+ ngx_http_gunzip_filter_get_buf(ngx_http_request_t *r,
+     ngx_http_gunzip_ctx_t *ctx)
+ {
++    ngx_chain_t             *cl;
+     ngx_http_gunzip_conf_t  *conf;
+ 
+     if (ctx->zstream.avail_out) {
+@@ -383,8 +389,12 @@ ngx_http_gunzip_filter_get_buf(ngx_http_request_t *r,
+     conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module);
+ 
+     if (ctx->free) {
+-        ctx->out_buf = ctx->free->buf;
+-        ctx->free = ctx->free->next;
++
++        cl = ctx->free;
++        ctx->out_buf = cl->buf;
++        ctx->free = cl->next;
++
++        ngx_free_chain(r->pool, cl);
+ 
+         ctx->out_buf->flush = 0;
+ 
+diff --git a/src/http/modules/ngx_http_gzip_filter_module.c b/src/http/modules/ngx_http_gzip_filter_module.c
+index b8c5ccc..1d17a6d 100644
+--- a/src/http/modules/ngx_http_gzip_filter_module.c
++++ b/src/http/modules/ngx_http_gzip_filter_module.c
+@@ -978,10 +978,14 @@ static void
+ ngx_http_gzip_filter_free_copy_buf(ngx_http_request_t *r,
+     ngx_http_gzip_ctx_t *ctx)
+ {
+-    ngx_chain_t  *cl;
++    ngx_chain_t  *cl, *ln;
++
++    for (cl = ctx->copied; cl; /* void */) {
++        ln = cl;
++        cl = cl->next;
+ 
+-    for (cl = ctx->copied; cl; cl = cl->next) {
+-        ngx_pfree(r->pool, cl->buf->start);
++        ngx_pfree(r->pool, ln->buf->start);
++        ngx_free_chain(r->pool, ln);
+     }
+ 
+     ctx->copied = NULL;
+diff --git a/src/http/modules/ngx_http_ssi_filter_module.c b/src/http/modules/ngx_http_ssi_filter_module.c
+index 6737965..a55f6e5 100644
+--- a/src/http/modules/ngx_http_ssi_filter_module.c
++++ b/src/http/modules/ngx_http_ssi_filter_module.c
+@@ -455,9 +455,13 @@ ngx_http_ssi_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
+     while (ctx->in || ctx->buf) {
+ 
+         if (ctx->buf == NULL) {
+-            ctx->buf = ctx->in->buf;
+-            ctx->in = ctx->in->next;
++
++            cl = ctx->in;
++            ctx->buf = cl->buf;
++            ctx->in = cl->next;
+             ctx->pos = ctx->buf->pos;
++
++            ngx_free_chain(r->pool, cl);
+         }
+ 
+         if (ctx->state == ssi_start_state) {
+diff --git a/src/http/modules/ngx_http_sub_filter_module.c b/src/http/modules/ngx_http_sub_filter_module.c
+index 6d3de59..456bb27 100644
+--- a/src/http/modules/ngx_http_sub_filter_module.c
++++ b/src/http/modules/ngx_http_sub_filter_module.c
+@@ -335,9 +335,13 @@ ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
+     while (ctx->in || ctx->buf) {
+ 
+         if (ctx->buf == NULL) {
+-            ctx->buf = ctx->in->buf;
+-            ctx->in = ctx->in->next;
++
++            cl = ctx->in;
++            ctx->buf = cl->buf;
++            ctx->in = cl->next;
+             ctx->pos = ctx->buf->pos;
++
++            ngx_free_chain(r->pool, cl);
+         }
+ 
+         if (ctx->buf->flush || ctx->buf->recycled) {
+-- 
+2.44.0
+

SOURCES/maxim.key

@@ -0,0 +1,69 @@
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+=/pFc
+-----END PGP PUBLIC KEY BLOCK-----

SOURCES/mdounin.key

@@ -0,0 +1,33 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v1.4.11 (FreeBSD)
+
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SOURCES/sb.key

@@ -0,0 +1,41 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v1.4.11 (FreeBSD)
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SPECS/nginx.spec

@@ -41,7 +41,7 @@
 Name:              nginx
 Epoch:             1
 Version:           1.20.1
-Release:           14%{?dist}
+Release:           16%{?dist}.1
 
 Summary:           A high performance web server and reverse proxy server
 # BSD License (two clause)
@@ -91,6 +91,12 @@ Patch5:            0006-Fix-ALPACA-security-issue.patch
 # downstream patch for RHEL - https://bugzilla.redhat.com/show_bug.cgi?id=2028781
 Patch6:            0007-Enable-TLSv1.3-by-default.patch
 
+# security patch - https://issues.redhat.com/browse/RHEL-12518
+Patch7:            0008-CVE-2023-44487-HTTP-2-per-iteration-stream-handling.patch
+
+# upstream patch - https://issues.redhat.com/browse/RHEL-40075
+Patch8:            0009-Optimized-chain-link-usage.patch
+
 BuildRequires:     make
 BuildRequires:     gcc
 BuildRequires:     gnupg2
@@ -602,8 +608,12 @@ fi
 
 
 %changelog
-* Fri Apr 14 2023 MSVSphere Packaging Team <packager@msvsphere.ru> - 1.20.1-14
+* Tue Jul 16 2024 Luboš Uhliarik <luhliari@redhat.com> - 1:1.20.1-16.1
-- Rebuilt for MSVSphere 9.2 beta
+- Resolves: RHEL-48791 - nginx worker processes memory leak
+
+* Mon Oct 16 2023 Luboš Uhliarik <luhliari@redhat.com> - 1:1.20.1-16
+- Resolves: RHEL-12518 - nginx: HTTP/2: Multiple HTTP/2 enabled web servers are
+  vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)
 
 * Thu Nov 24 2022 Luboš Uhliarik <luhliari@redhat.com> - 1:1.20.1-14
 - Resolves: #2086527 - Fix logrotate config and nginx log dir permissions