Bug 1862258 (CVE-2020-14347) - CVE-2020-14347 xorg-x11-server: Leak of uninitialized heap memory from the X server to clients in AllocatePixmap of dix/pixmap.c
Summary: CVE-2020-14347 xorg-x11-server: Leak of uninitialized heap memory from the X ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-14347
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1862319 1862320 1862517 1910717
Blocks: 1862265
TreeView+ depends on / blocked
 
Reported: 2020-07-30 20:07 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-05-18 15:11 UTC (History)
11 users (show)

Fixed In Version: xorg-server 1.20.9
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the way the Xserver memory was not properly initialized. This issue leak parts of server memory to the X client. In cases where the Xorg server runs with elevated privileges, this flaw results in a possible ASLR bypass.
Clone Of:
Environment:
Last Closed: 2020-12-14 18:47:05 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:5408 0 None None None 2020-12-14 16:29:16 UTC

Description Guilherme de Almeida Suckevicz 2020-07-30 20:07:40 UTC 
Allocation for pixmap data in AllocatePixmap() does not initialize the memory in xserver, it leads to leak uninitialize heap memory to clients. When the X server runs with elevated privileges, this can lead to privilege elevation in the client.
Comment 2 Huzaifa S. Sidhpurwala 2020-07-31 03:18:39 UTC 
Acknowledgments:

Name: X.org project
Upstream: Jan-Niklas Sohn (Trend Micro Zero Day Initiative)
Comment 4 msiddiqu 2020-07-31 15:33:13 UTC 
Public via: 

https://www.openwall.com/lists/oss-security/2020/07/31/2
Comment 5 msiddiqu 2020-07-31 15:33:35 UTC 
Created xorg-x11-server tracking bugs for this issue:

Affects: fedora-all [bug 1862517]
Comment 6 Huzaifa S. Sidhpurwala 2020-08-01 05:29:02 UTC 
External References:

https://lists.x.org/archives/xorg-announce/2020-July/003051.html
Comment 8 errata-xmlrpc 2020-12-14 16:29:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:5408 https://access.redhat.com/errata/RHSA-2020:5408
Comment 9 Product Security DevOps Team 2020-12-14 18:47:05 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-14347
Comment 11 errata-xmlrpc 2021-05-18 15:11:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1804 https://access.redhat.com/errata/RHSA-2021:1804
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