Debian 10 Buster DLA-3602-1 Moderate: LibX11 Memory Issues DoS Risk

debian lts

October 5, 2023

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

Topics Covered

security advisory denial of service buffer overflow debian out of bounds libx11 infinite recursion

Summary

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/source-package/libx11

Further information about Debian LTS security advisories, how to apply