diff options
Diffstat (limited to 'meta/recipes-core/zlib/zlib/CVE-2022-37434.patch')
| -rw-r--r-- | meta/recipes-core/zlib/zlib/CVE-2022-37434.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/meta/recipes-core/zlib/zlib/CVE-2022-37434.patch b/meta/recipes-core/zlib/zlib/CVE-2022-37434.patch new file mode 100644 index 0000000000..d29e6e0f1f --- /dev/null +++ b/meta/recipes-core/zlib/zlib/CVE-2022-37434.patch @@ -0,0 +1,44 @@ +From 8617d83d6939754ae3a04fc2d22daa18eeea2a43 Mon Sep 17 00:00:00 2001 +From: Hitendra Prajapati <hprajapati@mvista.com> +Date: Wed, 17 Aug 2022 10:15:57 +0530 +Subject: [PATCH] CVE-2022-37434 + +Upstream-Status: Backport [https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1 & https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d] +CVE: CVE-2022-37434 +Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com> + +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. + + 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 | 5 +++-- + 1 file changed, 3 insertions(+), 2 deletions(-) + +diff --git a/inflate.c b/inflate.c +index ac333e8..cd01857 100644 +--- a/inflate.c ++++ b/inflate.c +@@ -759,8 +759,9 @@ int flush; + if (copy > have) copy = have; + if (copy) { + 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_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); +-- +2.25.1 + |