exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

Secunia Security Advisory 27040

Secunia Security Advisory 27040
Posted Oct 3, 2007
Authored by Secunia | Site secunia.com

Secunia Security Advisory - Some vulnerabilities have been reported in the X.Org X11 X Font Server (XFS), which can be exploited by malicious, local users to gain escalated privileges.

tags | advisory, local, vulnerability
SHA-256 | c637aea3da50b1fb7c802ca05f31dba0fc4437ad652d3fd65286f760d8ca4d71

Secunia Security Advisory 27040

Change Mirror Download


----------------------------------------------------------------------

Try a new way to discover vulnerabilities that ALREADY EXIST in your
IT infrastructure.

The Secunia NSI enables you to INSPECT, DISCOVER, and DOCUMENT
vulnerabilities in more than 4,700 different Windows applications.

Request your account, the Secunia Network Software Inspector (NSI):
http://secunia.com/network_software_inspector/

----------------------------------------------------------------------

TITLE:
X.Org X11 X Font Server Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA27040

VERIFY ADVISORY:
http://secunia.com/advisories/27040/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

REVISION:
1.1 originally posted 2007-10-03

SOFTWARE:
X Window System 11 (X11) 7.x
http://secunia.com/product/8806/
X Window System 11 (X11) 6.x
http://secunia.com/product/3913/

DESCRIPTION:
Some vulnerabilities have been reported in the X.Org X11 X Font
Server (XFS), which can be exploited by malicious, local users to
gain escalated privileges.

1) An integer overflow exists within the handlers for the X protocol
requests "QueryXBitmaps" and "QueryXExtents", which do not correctly
check the "length" parameters before passing them to the
"build_range()" function. This can be exploited to cause a heap-based
buffer overflow by sending specially crafted "QueryXBitmaps" and
"QueryXExtents" requests to a vulnerable service.

2) An error exists within the handler for the X protocol requests
"QueryXBitmaps" and "QueryXExtents" when calling the "swap_char2b()"
function, which can be exploited to swap an arbitrary number of bytes
on the heap, resulting in a heap corruption.

Note: On certain systems (e.g. Sun Solaris), these vulnerabilities
may be remotely exploitable through port 7100/TCP.

The vulnerabilities are reported in X.Org XFS 1.0.4 (X11R7.2 and
X11R7.3) and prior.

SOLUTION:
Update to X.Org XFS 1.0.5.

PROVIDED AND/OR DISCOVERED BY:
Sean Larsson, VeriSign iDefense Labs

CHANGELOG:
2007-10-03: Added CVE reference.

ORIGINAL ADVISORY:
X.Org:
http://lists.freedesktop.org/archives/xorg-announce/2007-October/000416.html

iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=602

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

Login or Register to add favorites

File Archive:

November 2022

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Nov 1st
    16 Files
  • 2
    Nov 2nd
    17 Files
  • 3
    Nov 3rd
    17 Files
  • 4
    Nov 4th
    11 Files
  • 5
    Nov 5th
    0 Files
  • 6
    Nov 6th
    0 Files
  • 7
    Nov 7th
    3 Files
  • 8
    Nov 8th
    59 Files
  • 9
    Nov 9th
    12 Files
  • 10
    Nov 10th
    6 Files
  • 11
    Nov 11th
    11 Files
  • 12
    Nov 12th
    1 Files
  • 13
    Nov 13th
    0 Files
  • 14
    Nov 14th
    9 Files
  • 15
    Nov 15th
    33 Files
  • 16
    Nov 16th
    53 Files
  • 17
    Nov 17th
    11 Files
  • 18
    Nov 18th
    14 Files
  • 19
    Nov 19th
    0 Files
  • 20
    Nov 20th
    0 Files
  • 21
    Nov 21st
    26 Files
  • 22
    Nov 22nd
    22 Files
  • 23
    Nov 23rd
    10 Files
  • 24
    Nov 24th
    9 Files
  • 25
    Nov 25th
    11 Files
  • 26
    Nov 26th
    0 Files
  • 27
    Nov 27th
    0 Files
  • 28
    Nov 28th
    20 Files
  • 29
    Nov 29th
    9 Files
  • 30
    Nov 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Hosting By
Rokasec
close