| Name | CVE-2023-5574 |
| Description | A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped from a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1055426 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| xorg-server (PTS) | bullseye | 2:1.20.11-1+deb11u13 | vulnerable |
| bullseye (security) | 2:1.20.11-1+deb11u14 | vulnerable |
| bookworm, bookworm (security) | 2:21.1.7-3+deb12u8 | vulnerable |
| trixie | 2:21.1.14-2 | vulnerable |
| sid | 2:21.1.15-2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| xorg-server | source | (unstable) | (unfixed) | | | 1055426 |
Notes
[bookworm] - xorg-server <postponed> (Minor issue, revisit when fixed upstream)
[bullseye] - xorg-server <no-dsa> (Minor issue)
[buster] - xorg-server <no-dsa> (Minor issue)
https://lists.x.org/archives/xorg-announce/2023-October/003430.html
https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1189