xkb: Fix buffer overflow in _XkbSetCompatMap() #1092
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Fixes ArcticaProject#1085 (CVE-2024-9632) Backport of this xorg-xserver upstream commit: commit 85b776571487f52e756f68a069c768757369bfe3 Author: Matthieu Herrb <matthieu@herrb.eu> Date: Thu Oct 10 10:37:28 2024 +0200 xkb: Fix buffer overflow in _XkbSetCompatMap() The _XkbSetCompatMap() function attempts to resize the `sym_interpret` buffer. However, It didn't update its size properly. It updated `num_si` only, without updating `size_si`. This may lead to local privilege escalation if the server is run as root or remote code execution (e.g. x11 over ssh). CVE-2024-9632, ZDI-CAN-24756 This vulnerability was discovered by: Jan-Niklas Sohn working with Trend Micro Zero Day Initiative Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net> Tested-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: José Expósito <jexposit@redhat.com> Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1733>
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Fixes #1085 (CVE-2024-9632)
Backport of this xorg-xserver upstream commit:
commit 85b776571487f52e756f68a069c768757369bfe3
Author: Matthieu Herrb matthieu@herrb.eu
Date: Thu Oct 10 10:37:28 2024 +0200