diff options
Diffstat (limited to 'meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2021-4008.patch')
-rw-r--r-- | meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2021-4008.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2021-4008.patch b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2021-4008.patch new file mode 100644 index 0000000000..3277be0185 --- /dev/null +++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2021-4008.patch @@ -0,0 +1,59 @@ +Backport patch to fix CVE-2021-4008. + +CVE: CVE-2021-4008 +Upstream-Status: Backport [https://gitlab.freedesktop.org/xorg/xserver/-/commit/ebce7e2] + +Signed-off-by: Kai Kang <kai.kang@windriver.com> + +From ebce7e2d80e7c80e1dda60f2f0bc886f1106ba60 Mon Sep 17 00:00:00 2001 +From: Povilas Kanapickas <povilas@radix.lt> +Date: Tue, 14 Dec 2021 15:00:03 +0200 +Subject: [PATCH] render: Fix out of bounds access in + SProcRenderCompositeGlyphs() + +ZDI-CAN-14192, CVE-2021-4008 + +This vulnerability was discovered and the fix was suggested by: +Jan-Niklas Sohn working with Trend Micro Zero Day Initiative + +Signed-off-by: Povilas Kanapickas <povilas@radix.lt> +--- + render/render.c | 9 +++++++++ + 1 file changed, 9 insertions(+) + +diff --git a/render/render.c b/render/render.c +index c376090ca..456f156d4 100644 +--- a/render/render.c ++++ b/render/render.c +@@ -2309,6 +2309,9 @@ SProcRenderCompositeGlyphs(ClientPtr client) + + i = elt->len; + if (i == 0xff) { ++ if (buffer + 4 > end) { ++ return BadLength; ++ } + swapl((int *) buffer); + buffer += 4; + } +@@ -2319,12 +2322,18 @@ SProcRenderCompositeGlyphs(ClientPtr client) + buffer += i; + break; + case 2: ++ if (buffer + i * 2 > end) { ++ return BadLength; ++ } + while (i--) { + swaps((short *) buffer); + buffer += 2; + } + break; + case 4: ++ if (buffer + i * 4 > end) { ++ return BadLength; ++ } + while (i--) { + swapl((int *) buffer); + buffer += 4; +-- +GitLab + |