CVE-2023-43787: Libx11: integer overflow in xcreateimage() leading to a heap overflow
First published: Thu Oct 05 2023(Updated: )
A vulnerability was found in libX11 due to an integer overflow within the XCreateImage() function. This flaw allows a local user to trigger an integer overflow and execute arbitrary code with elevated privileges.
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-2023-43787
- https://bugzilla.redhat.com/show_bug.cgi?id=2242254
- 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://jfrog.com/blog/xorg-libx11-vulns-cve-2023-43786-cve-2023-43787-part-two/
- https://security.netapp.com/advisory/ntap-20231103-0006/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2243046
- https://launchpad.net/bugs/cve/CVE-2023-43787
- https://www.openwall.com/lists/oss-security/2023/10/03/1
- https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/7916869d16bdd115ac5be30a67c3749907aea6a0
- https://gitlab.freedesktop.org/xorg/lib/libxpm/-/commit/91f887b41bf75648df725a4ed3be036da02e911e
- https://jfrog.com/blog/xorg-libx11-vulns-cve-2023-43786-cve-2023-43787-part-one/
- https://security-tracker.debian.org/tracker/CVE-2023-43787
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43787
- https://nvd.nist.gov/vuln/detail/CVE-2023-43787
- https://ubuntu.com/security/CVE-2023-43787
Frequently Asked Questions
What is CVE-2023-43787?
CVE-2023-43787 is a vulnerability in the libX11 library that allows an attacker to trigger a heap overflow through an integer overflow in the XCreateImage() function.
How severe is CVE-2023-43787?
CVE-2023-43787 has a severity rating of high.
Which software versions are affected by CVE-2023-43787?
Versions 1.8.7 of libX11 (Ubuntu) and versions up to 1.8.7 (Ubuntu) are affected by CVE-2023-43787.
How do I fix CVE-2023-43787?
To fix CVE-2023-43787, upgrade to version 1.8.7 (Ubuntu) or later, or apply the recommended patches for your specific Ubuntu or Debian distribution.
Where can I find more information about CVE-2023-43787?
You can find more information about CVE-2023-43787 in the CVE entry at [https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43787](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43787) and the Ubuntu security notices at [https://ubuntu.com/security/notices/USN-6407-1](https://ubuntu.com/security/notices/USN-6407-1) and [https://ubuntu.com/security/notices/USN-6408-1](https://ubuntu.com/security/notices/USN-6408-1).
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