From 7f86b986893cd27680523e2c061a2df32c5a95cf Mon Sep 17 00:00:00 2001
From: CentOS Sources <bugs@centos.org>
Date: Mar 07 2023 09:23:28 +0000
Subject: import zlib-1.2.7-21.el7_9


---

diff --git a/SOURCES/zlib-1.2.7-cve-2022-37434.patch b/SOURCES/zlib-1.2.7-cve-2022-37434.patch
new file mode 100644
index 0000000..1f3aa8d
--- /dev/null
+++ b/SOURCES/zlib-1.2.7-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
+
diff --git a/SOURCES/zlib-1.2.7-cve-2022-37434_2.patch b/SOURCES/zlib-1.2.7-cve-2022-37434_2.patch
new file mode 100644
index 0000000..d0e9d1b
--- /dev/null
+++ b/SOURCES/zlib-1.2.7-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
+
diff --git a/SPECS/zlib.spec b/SPECS/zlib.spec
index f745af9..c215022 100644
--- a/SPECS/zlib.spec
+++ b/SPECS/zlib.spec
@@ -1,7 +1,7 @@
 Summary: The compression and decompression library
 Name: zlib
 Version: 1.2.7
-Release: 20%{?dist}
+Release: 21%{?dist}
 # /contrib/dotzlib/ have Boost license
 License: zlib and Boost
 Group: System Environment/Libraries
@@ -20,6 +20,10 @@ Patch4: zlib-1.2.7-Fix-bug-where-gzopen-gzclose-would-write-an-empty-fi.patch
 # resolves: #1875700
 Patch5: zlib-1.2.7-fix-access-password-protected-files-libminizip.patch
 Patch6: zlib-1.2.7-CVE-2018-25032.patch
+# Patches for CVE-2022-37434
+Patch12: zlib-1.2.7-cve-2022-37434.patch
+Patch13: zlib-1.2.7-cve-2022-37434_2.patch
+
 
 BuildRequires: automake, autoconf, libtool
 
@@ -80,6 +84,8 @@ mv ChangeLog.tmp ChangeLog
 %patch4 -p1
 %patch5 -p1
 %patch6 -p1
+%patch12 -p1
+%patch13 -p1
 
 %build
 %ifarch ppc64 ppc64le
@@ -143,6 +149,10 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/*.la
 %{_libdir}/pkgconfig/minizip.pc
 
 %changelog
+* Mon Jan 30 2023 Lukas Javorsky <ljavorsk@redhat.com> - 1.2.7-21
+- Fix heap-based buffer over-read or buffer overflow in inflate in inflate.c
+- Resolves: CVE-2022-37434
+
 * Tue Apr 12 2022 Matej Mužila <mmuzila@redhat.com> - 1.2.7-20
 - Resolves: CVE-2018-25032