diff options
Diffstat (limited to 'sys-libs/zlib/files/zlib-1.2.12-CVE-2022-37434.patch')
| -rw-r--r-- | sys-libs/zlib/files/zlib-1.2.12-CVE-2022-37434.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sys-libs/zlib/files/zlib-1.2.12-CVE-2022-37434.patch b/sys-libs/zlib/files/zlib-1.2.12-CVE-2022-37434.patch new file mode 100644 index 000000000000..1ef3b909e435 --- /dev/null +++ b/sys-libs/zlib/files/zlib-1.2.12-CVE-2022-37434.patch @@ -0,0 +1,55 @@ +https://bugs.gentoo.org/863851 +https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1 +https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d (see https://github.com/curl/curl/issues/9271) + +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. +--- 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); + +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. +--- 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); + |