CVE-2017-13721

Publication date 9 October 2017

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

In X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
xorg	17.04 zesty	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
xorg-hwe-16.04	17.04 zesty	Not in release
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
xorg-server	17.04 zesty	Fixed 2:1.19.3-1ubuntu1.2
	16.04 LTS xenial	Fixed 2:1.18.4-0ubuntu0.6
	14.04 LTS trusty	Fixed 2:1.15.1-0ubuntu2.10
xorg-server-hwe-16.04	17.04 zesty	Not in release
	16.04 LTS xenial	Fixed 2:1.19.3-1ubuntu1~16.04.3
	14.04 LTS trusty	Not in release
xorg-server-lts-utopic	17.04 zesty	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
xorg-server-lts-vivid	17.04 zesty	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
xorg-server-lts-wily	17.04 zesty	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
xorg-server-lts-xenial	17.04 zesty	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Fixed 2:1.18.3-1ubuntu2.3~trusty3

Patch details

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

Package	Patch details
xorg-server	Upstream: ?id=b95

Severity score breakdown

Parameter	Value
Base score	4.7 · Medium
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3453-1
X.Org X server vulnerabilities
12 October 2017