Bug 1500387 – CVE-2017-13721 xorg-x11-server: Insufficient validation of shmseg resource id

Bugzilla will be upgraded to version 5.0 on a still to be determined date in the near future. The original upgrade date has been delayed.

Bug 1500387 - (CVE-2017-13721) CVE-2017-13721 xorg-x11-server: Insufficient validation of shmseg resource id

Summary:	CVE-2017-13721 xorg-x11-server: Insufficient validation of shmseg resource id

Status:	CLOSED WONTFIX

Aliases:	CVE-2017-13721

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20171004,reported=2...
Keywords:	Security

Depends On:	1500389
Blocks:	1500390
	Show dependency tree / graph

Reported:	2017-10-10 09:25 EDT by Andrej Nemec
Modified:	2017-11-01 01:15 EDT (History)
CC List:	13 users (show)

See Also:
Fixed In Version:	xorg-x11-server 1.19.4
Doc Type:	If docs needed, set a value
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2017-11-01 01:12:19 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Andrej Nemec 2017-10-10 09:25:47 EDT

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.

References:

http://www.openwall.com/lists/oss-security/2017/10/04/10
https://lists.x.org/archives/xorg-announce/2017-October/002808.html

Upstream patch:

https://cgit.freedesktop.org/xorg/xserver/commit/?id=b95f25af141d33a65f6f821ea9c003f66a01e1f1

Comment 1 Andrej Nemec 2017-10-10 09:29:12 EDT

Created xorg-x11-server tracking bugs for this issue:

Affects: fedora-all [bug 1500389]

Note You need to log in before you can comment on or make changes to this bug.