Julien Cristau pushed to branch debian-bullseye at X Strike Force / xserver /
xorg-server
Commits:
6c4d399c by Julien Cristau at 2023-02-01T15:12:51+01:00
Xi: fix potential use-after-free in DeepCopyPointerClasses (CVE-2023-0494)
- - - - -
3 changed files:
- debian/changelog
- + debian/patches/20_Xi-fix-potential-use-after-free-in-DeepCopyPointerCl.patch
- debian/patches/series
Changes:
=====================================
debian/changelog
=====================================
@@ -1,3 +1,9 @@
+xorg-server (2:1.20.11-1+deb11u5) bullseye-security; urgency=high
+
+ * Xi: fix potential use-after-free in DeepCopyPointerClasses (CVE-2023-0494)
+
+ -- Julien Cristau <jcris...@debian.org> Wed, 01 Feb 2023 15:11:18 +0100
+
xorg-server (2:1.20.11-1+deb11u4) bullseye-security; urgency=high
* Non-maintainer upload by the Security Team.
=====================================
debian/patches/20_Xi-fix-potential-use-after-free-in-DeepCopyPointerCl.patch
=====================================
@@ -0,0 +1,30 @@
+From 7150ba655c0cc08fa6ded309b81265bb672f2869 Mon Sep 17 00:00:00 2001
+From: Peter Hutterer <peter.hutte...@who-t.net>
+Date: Wed, 25 Jan 2023 11:41:40 +1000
+Subject: [PATCH xserver] Xi: fix potential use-after-free in
+ DeepCopyPointerClasses
+
+CVE-2023-0494, ZDI-CAN 19596
+
+This vulnerability was discovered by:
+Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
+
+Signed-off-by: Peter Hutterer <peter.hutte...@who-t.net>
+---
+ Xi/exevents.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+--- a/Xi/exevents.c
++++ b/Xi/exevents.c
+@@ -575,8 +575,10 @@ DeepCopyPointerClasses(DeviceIntPtr from
+ memcpy(to->button->xkb_acts, from->button->xkb_acts,
+ sizeof(XkbAction));
+ }
+- else
++ else {
+ free(to->button->xkb_acts);
++ to->button->xkb_acts = NULL;
++ }
+
+ memcpy(to->button->labels, from->button->labels,
+ from->button->numButtons * sizeof(Atom));
=====================================
debian/patches/series
=====================================
@@ -19,3 +19,4 @@
17_Xi-return-an-error-from-XI-property-changes-if-verif.patch
18_Xi-avoid-integer-truncation-in-length-check-of-ProcX.patch
19_xkb-reset-the-radio_groups-pointer-to-NULL-after-fre.patch
+20_Xi-fix-potential-use-after-free-in-DeepCopyPointerCl.patch
View it on GitLab:
https://salsa.debian.org/xorg-team/xserver/xorg-server/-/commit/6c4d399c47b4336b87a7fb88499f47079028be97
--
View it on GitLab:
https://salsa.debian.org/xorg-team/xserver/xorg-server/-/commit/6c4d399c47b4336b87a7fb88499f47079028be97
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