CVE-2023-43786: Libx11: stack exhaustion from infinite recursion in putsubimage()
First published: Thu Oct 05 2023(Updated: )
A vulnerability was found in libX11 due to an infinite loop within the PutSubImage() function. This flaw allows a local user to consume all available system resources and cause a denial of service condition.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| X.Org libX11 | <1.8.7 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 | |
| Fedoraproject Fedora | =38 | |
| redhat/libX11 | <1.8.7 | 1.8.7 |
| debian/libx11 | 2:1.7.2-1+deb11u2 2:1.8.4-2+deb12u2 2:1.8.7-1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2023-43786
- https://bugzilla.redhat.com/show_bug.cgi?id=2242253
- http://www.openwall.com/lists/oss-security/2024/01/24/9
- https://access.redhat.com/errata/RHSA-2024:2145
- https://access.redhat.com/errata/RHSA-2024:2973
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/63IBRFLQVZSMOAZBZOBKFWJP26ILRAGQ/
- https://security.netapp.com/advisory/ntap-20231103-0006/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2243050
- https://launchpad.net/bugs/cve/CVE-2023-43786
- https://www.openwall.com/lists/oss-security/2023/10/03/1
- https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/204c3393c4c90a29ed6bef64e43849536e863a86
- https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/73a37d5f2fcadd6540159b432a70d80f442ddf4a
- https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/b4031fc023816aca07fbd592ed97010b9b48784b
- https://gitlab.freedesktop.org/xorg/lib/libxpm/-/commit/84fb14574c039f19ad7face87eb9acc31a50701c
- https://jfrog.com/blog/xorg-libx11-vulns-cve-2023-43786-cve-2023-43787-part-one/
- https://jfrog.com/blog/xorg-libx11-vulns-cve-2023-43786-cve-2023-43787-part-two/
- https://security-tracker.debian.org/tracker/CVE-2023-43786
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43786
- https://nvd.nist.gov/vuln/detail/CVE-2023-43786
- https://ubuntu.com/security/CVE-2023-43786
Frequently Asked Questions
What is CVE-2023-43786?
CVE-2023-43786 is a vulnerability in libX11 that allows for stack exhaustion from infinite recursion in PutSubImage().
How does CVE-2023-43786 affect libX11?
CVE-2023-43786 affects libX11 versions 1.8.7 and earlier, 2:1.6.9-2ubuntu1.6 and earlier, 2:1.7.5-1ubuntu0.3 and earlier, and 2:1.8.4-2ubuntu0.3 and earlier.
How severe is CVE-2023-43786?
CVE-2023-43786 is considered a serious vulnerability.
Where can I find more information about CVE-2023-43786?
More information about CVE-2023-43786 can be found on the MITRE CVE website and the Ubuntu security notices USN-6407-1 and USN-6408-1.
How can I fix CVE-2023-43786?
To fix CVE-2023-43786, update to libX11 version 1.8.7 or later, 2:1.6.9-2ubuntu1.6 or later, 2:1.7.5-1ubuntu0.3 or later, or 2:1.8.4-2ubuntu0.3 or later.
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