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HistoryOct 05, 2023 - 10:39 a.m.

[SECURITY] [DLA 3602-1] libx11 security update

2023-10-0510:39:13
lists.debian.org
9
buffer overflow
arbitrary code execution
x11
libx11
denial of service
debian 10 buster
security update

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

8.8

Confidence

High

EPSS

0

Percentile

5.1%


Debian LTS Advisory DLA-3602-1 [email protected]
https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
October 05, 2023 https://wiki.debian.org/LTS


Package : libx11
Version : 2:1.6.7-1+deb10u4
CVE ID : CVE-2023-43785 CVE-2023-43786 CVE-2023-43787

Several vulnerabilities were found in libx11, the X11 client-side
library.

CVE-2023-43785

Gregory James Duck discovered an out of bounds memory access in
_XkbReadKeySyms, which could result in denial of service.

CVE-2023-43786

Yair Mizrahi found an infinite recursion in PutSubImage when
parsing a crafted file, which would result in stack exhaustion
and denial of service.

CVE-2023-43787

Yair Mizrahi discovered an integer overflow in XCreateImage
when parsing crafted input, which would result in a small buffer
allocation leading into a buffer overflow. This could result
in denial of service or potentially in arbitrary code execution.

For Debian 10 buster, these problems have been fixed in version
2:1.6.7-1+deb10u4.

We recommend that you upgrade your libx11 packages.

For the detailed security status of libx11 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/libx11

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

8.8

Confidence

High

EPSS

0

Percentile

5.1%