import zlib-1.2.11-19.el8_6

SOURCES/zlib-1.2.11-cve-2022-37434.patch

@@ -0,0 +1,35 @@
+From eff308af425b67093bab25f80f1ae950166bece1 Mon Sep 17 00:00:00 2001
+From: Mark Adler <fork@madler.net>
+Date: Sat, 30 Jul 2022 15:51:11 -0700
+Subject: [PATCH] Fix a bug when getting a gzip header extra field with
+ inflate().
+
+If the extra field was larger than the space the user provided with
+inflateGetHeader(), and if multiple calls of inflate() delivered
+the extra header data, then there could be a buffer overflow of the
+provided space. This commit assures that provided space is not
+exceeded.
+---
+ inflate.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/inflate.c b/inflate.c
+index 7be8c63..7a72897 100644
+--- a/inflate.c
++++ b/inflate.c
+@@ -763,9 +763,10 @@ int flush;
+                 copy = state->length;
+                 if (copy > have) copy = have;
+                 if (copy) {
++                    len = state->head->extra_len - state->length;
+                     if (state->head != Z_NULL &&
+-                        state->head->extra != Z_NULL) {
+-                        len = state->head->extra_len - state->length;
++                        state->head->extra != Z_NULL &&
++                        len < state->head->extra_max) {
+                         zmemcpy(state->head->extra + len, next,
+                                 len + copy > state->head->extra_max ?
+                                 state->head->extra_max - len : copy);
+-- 
+2.35.3
+

SOURCES/zlib-1.2.11-cve-2022-37434_2.patch

@@ -0,0 +1,32 @@
+From 1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d Mon Sep 17 00:00:00 2001
+From: Mark Adler <fork@madler.net>
+Date: Mon, 8 Aug 2022 10:50:09 -0700
+Subject: [PATCH] Fix extra field processing bug that dereferences NULL
+ state->head.
+
+The recent commit to fix a gzip header extra field processing bug
+introduced the new bug fixed here.
+---
+ inflate.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/inflate.c b/inflate.c
+index 7a72897..2a3c4fe 100644
+--- a/inflate.c
++++ b/inflate.c
+@@ -763,10 +763,10 @@ int flush;
+                 copy = state->length;
+                 if (copy > have) copy = have;
+                 if (copy) {
+-                    len = state->head->extra_len - state->length;
+                     if (state->head != Z_NULL &&
+                         state->head->extra != Z_NULL &&
+-                        len < state->head->extra_max) {
++                        (len = state->head->extra_len - state->length) <
++                            state->head->extra_max) {
+                         zmemcpy(state->head->extra + len, next,
+                                 len + copy > state->head->extra_max ?
+                                 state->head->extra_max - len : copy);
+-- 
+2.35.3
+

SPECS/zlib.spec

@@ -3,7 +3,7 @@
 
 Name:    zlib
 Version: 1.2.11
-Release: 18%{?dist}
+Release: 19%{?dist}
 Summary: The compression and decompression library
 # /contrib/dotzlib/ have Boost license
 License: zlib and Boost
@@ -33,6 +33,10 @@ Patch8: zlib-1.2.11-IBM-DFLTCC-compression-level-switching-issues.patch
 Patch9: zlib-1.2.11-inflateSyncPoint-return-value-fix.patch
 Patch10: zlib-1.2.11-CVE-2018-25032.patch
 
+# Patches for CVE-2022-37434
+Patch12: zlib-1.2.11-cve-2022-37434.patch
+Patch13: zlib-1.2.11-cve-2022-37434_2.patch
+
 BuildRequires: automake, autoconf, libtool
 
 %description
@@ -95,6 +99,8 @@ developing applications which use minizip.
 %patch8 -p1
 %patch9 -p1
 %patch10 -p1
+%patch12 -p1
+%patch13 -p1
 
 iconv -f iso-8859-2 -t utf-8 < ChangeLog > ChangeLog.tmp
 mv ChangeLog.tmp ChangeLog
@@ -174,6 +180,10 @@ find $RPM_BUILD_ROOT -name '*.la' -delete
 
 
 %changelog
+* Tue Aug 09 2022 Matej Mužila <mmuzila@redhat.com> - 1.2.11.19
+- Fix heap-based buffer over-read or buffer overflow in inflate in inflate.c
+- Resolves: CVE-2022-37434
+
 * Tue Mar 29 2022 Matej Mužila <mmuzila@redhat.com> - 1.2.11-18
 - Resolves: CVE-2018-25032