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| author | Petr Štetiar <ynezz@true.cz> | 2022-08-09 07:50:19 +0200 |
|---|---|---|
| committer | Petr Štetiar <ynezz@true.cz> | 2022-08-09 08:08:08 +0200 |
| commit | f443e9de7003c00a935b9ea12f168e09e83b48cd (patch) | |
| tree | 2ce20bbb4f3b8ffcf3f8814a5e792fa749462d76 /package/libs/zlib | |
| parent | eada8925776aafa3ec47d66fb89bf7eae730edf7 (diff) | |
| download | upstream-f443e9de7003c00a935b9ea12f168e09e83b48cd.tar.gz upstream-f443e9de7003c00a935b9ea12f168e09e83b48cd.tar.bz2 upstream-f443e9de7003c00a935b9ea12f168e09e83b48cd.zip | |
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>
Diffstat (limited to 'package/libs/zlib')
| -rw-r--r-- | package/libs/zlib/patches/007-fix-null-dereference-in-fix-CVE-2022-37434.patch | 29 |
1 files changed, 29 insertions, 0 deletions
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); |