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CVE-2023-1393

Publication date 29 March 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.

Read the notes from the security team

Status

Package Ubuntu Release Status
tigervnc 24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Fixed 1.12.0+dfsg-8ubuntu0.23.10.1
23.04 lunar
Fixed 1.12.0+dfsg-8ubuntu0.23.04.1
22.04 LTS jammy
Fixed 1.12.0+dfsg-4ubuntu0.22.04.1
20.04 LTS focal
Fixed 1.10.1+dfsg-3ubuntu0.20.04.1
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Ignored end of standard support
xorg-server 24.10 oracular
Fixed 2:21.1.7-1ubuntu3
24.04 LTS noble
Fixed 2:21.1.7-1ubuntu3
23.10 mantic
Fixed 2:21.1.7-1ubuntu3
23.04 lunar
Fixed 2:21.1.7-1ubuntu3
22.10 kinetic
Fixed 2:21.1.4-2ubuntu1.7
22.04 LTS jammy
Fixed 2:21.1.3-2ubuntu2.9
20.04 LTS focal
Fixed 2:1.20.13-1ubuntu1~20.04.8
18.04 LTS bionic
Fixed 2:1.19.6-1ubuntu4.15
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation
xorg-server-hwe-16.04 22.10 kinetic Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty Not in release
xorg-server-hwe-18.04 22.10 kinetic Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Fixed 2:1.20.8-2ubuntu2.2~18.04.11
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
xorg-server-lts-utopic 22.10 kinetic Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored end of standard support
xorg-server-lts-vivid 22.10 kinetic Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored end of standard support
xorg-server-lts-wily 22.10 kinetic Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored end of standard support
xorg-server-lts-xenial 22.10 kinetic Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored end of standard support
xwayland 24.10 oracular
Fixed 2:22.1.8-1ubuntu1
24.04 LTS noble
Fixed 2:22.1.8-1ubuntu1
23.10 mantic
Fixed 2:22.1.8-1ubuntu1
23.04 lunar
Fixed 2:22.1.8-1ubuntu1
22.10 kinetic
Fixed 2:22.1.3-2ubuntu0.4
22.04 LTS jammy
Fixed 2:22.1.1-1ubuntu0.6
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

Notes

mdeslaur

xorg server is actually the xorg-server package the xorg package only contains docs xwayland package contains parts of xorg-server This is ZDI-CAN-19866 tigervnc needs a no-change rebuild once xorg-server is fixed

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
xorg-server

Severity score breakdown

Parameter Value
Base score 7.8 · High
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H