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authorPetr Štetiar <ynezz@true.cz>2022-08-09 07:50:19 +0200
committerPetr Štetiar <ynezz@true.cz>2022-08-09 08:12:46 +0200
commit707ec48ab3db6d08bd022df1bc720aee68b3b99d (patch)
tree6dbd5b0067642ab56224ba12791a21f8b5186adf /package/libs
parent5e0173de51eb7b68f0dd476b7915ca89d0c8ebca (diff)
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zlib: backport null dereference fix
The curl developers found test case that crashed in their testing when using zlib patched against CVE-2022-37434, same patch we've backported in commit 7df6795d4c25 ("zlib: backport fix for heap-based buffer over-read (CVE-2022-37434)"). So we need to backport following patch in order to fix issue introduced in that previous CVE-2022-37434 fix. References: https://github.com/curl/curl/issues/9271 Fixes: 7df6795d4c25 ("zlib: backport fix for heap-based buffer over-read (CVE-2022-37434)") Signed-off-by: Petr Štetiar <ynezz@true.cz> (cherry picked from commit f443e9de7003c00a935b9ea12f168e09e83b48cd)
Diffstat (limited to 'package/libs')
-rw-r--r--package/libs/zlib/Makefile2
-rw-r--r--package/libs/zlib/patches/007-fix-null-dereference-in-fix-CVE-2022-37434.patch29
2 files changed, 30 insertions, 1 deletions
diff --git a/package/libs/zlib/Makefile b/package/libs/zlib/Makefile
index 4f3c7a6b37..f30accf163 100644
--- a/package/libs/zlib/Makefile
+++ b/package/libs/zlib/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=zlib
PKG_VERSION:=1.2.11
-PKG_RELEASE:=5
+PKG_RELEASE:=6
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=@SF/libpng http://www.zlib.net
diff --git a/package/libs/zlib/patches/007-fix-null-dereference-in-fix-CVE-2022-37434.patch b/package/libs/zlib/patches/007-fix-null-dereference-in-fix-CVE-2022-37434.patch
new file mode 100644
index 0000000000..c5c95a92b2
--- /dev/null
+++ b/package/libs/zlib/patches/007-fix-null-dereference-in-fix-CVE-2022-37434.patch
@@ -0,0 +1,29 @@
+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 7a7289749..2a3c4fe98 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);