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.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | xorg-x11-server | 2023-11-29 23:18 | ALAS-2023-1892 |
Amazon Linux 2 - Core | xorg-x11-server | 2023-11-29 22:19 | ALAS2-2023-2352 |
Amazon Linux 2023 | xorg-x11-server | 2023-12-06 07:45 | ALAS2023-2023-444 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
NVD | CVSSv3 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |