Bug 782679 (CVE-2021-3472)

Summary:	<x11-base/xorg-server-1.20.11 - Input validation failures in X server XInput extension
Product:	Gentoo Security	Reporter:	Matthew Smith <matthew>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	critical	CC:	bertrand, x11
Priority:	Normal	Flags:	nattka: sanity-check+
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://www.openwall.com/lists/oss-security/2021/04/13/1
Whiteboard:	A1 [glsa+ cve]
Package list:	x11-base/xorg-server-1.20.11	Runtime testing required:	---

Description Matthew Smith gentoo-dev

2021-04-13 14:41:10 UTC

Insufficient checks on the lengths of the XInput extension
ChangeFeedbackControl request can lead to out of bounds memory
accesses in the X server.

These issues can lead to privilege escalation for authorized clients
on systems where the X server is running privileged.

Fixed in 7aaf54a (included in version 1.20.11).

Comment 1 NATTkA bot gentoo-dev

2021-04-13 14:44:21 UTC Comment hidden (obsolete)

Unable to check for sanity:

> disallowed package spec (only = allowed): <x11-base/xorg-server-1.20.11

Comment 2 NATTkA bot gentoo-dev

2021-04-13 14:52:22 UTC Comment hidden (obsolete)

Unable to check for sanity:

> no match for package: x11-base/xorg-server-1.20.10

Comment 3 John Helmert III archtester

2021-04-13 14:53:25 UTC

Thanks for the report! @x11, please proceed with stabilization when ready.

Comment 4 Matt Turner gentoo-dev

2021-04-13 16:14:16 UTC

Good to go!

Comment 5 Sam James archtester

2021-04-14 16:23:41 UTC

arm64 done

Comment 6 Sam James archtester

2021-04-14 16:24:21 UTC

arm done

Comment 7 Sam James archtester

2021-04-14 16:24:50 UTC

x86 done

Comment 8 Sam James archtester

2021-04-14 16:25:21 UTC

amd64 done

Comment 9 Sam James archtester

2021-04-14 16:26:45 UTC

ppc64 done

Comment 10 Rolf Eike Beer archtester

2021-04-15 18:47:34 UTC

sparc stable

Comment 11 Sam James archtester

2021-04-16 00:40:13 UTC

ppc done

all arches done

Comment 12 John Helmert III archtester

2021-04-16 14:32:53 UTC

Please cleanup.

Comment 13 Larry the Git Cow gentoo-dev

2021-04-30 21:48:51 UTC

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=18023eacab3717be38b9f88ffeb0bebf5ee81f56

commit 18023eacab3717be38b9f88ffeb0bebf5ee81f56
Author:     Thomas Deutschmann <whissi@gentoo.org>
AuthorDate: 2021-04-30 21:48:39 +0000
Commit:     Thomas Deutschmann <whissi@gentoo.org>
CommitDate: 2021-04-30 21:48:48 +0000

    x11-base/xorg-server: security cleanup
    
    Bug: https://bugs.gentoo.org/782679
    Package-Manager: Portage-3.0.18, Repoman-3.0.3
    Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>

 x11-base/xorg-server/Manifest                      |   1 -
 x11-base/xorg-server/xorg-server-1.20.10-r2.ebuild | 227 ---------------------
 x11-base/xorg-server/xorg-server-1.20.10-r3.ebuild | 225 --------------------
 3 files changed, 453 deletions(-)

Comment 14 Thomas Deutschmann (RETIRED) gentoo-dev

2021-04-30 21:49:14 UTC

New GLSA request filed.

Comment 15 GLSAMaker/CVETool Bot gentoo-dev

2021-05-01 00:01:17 UTC

This issue was resolved and addressed in
 GLSA 202104-02 at https://security.gentoo.org/glsa/202104-02
by GLSA coordinator Thomas Deutschmann (whissi).