|
 |
|
X.Org X11 Multiple Vulnerabilities
|
|
|
|
|
Secunia Advisory:
|
SA24741
|
|
|
Release Date:
|
2007-04-04
|
|
Last Update:
|
2007-04-25
|
|
|
Critical:
|
Less critical
|
|
Impact:
|
Exposure of sensitive information
Privilege escalation
DoS
|
|
Where:
|
Local system
|
|
Solution Status:
|
Vendor Workaround
|
|
| Software: | X Window System 11 (X11) 6.x
X Window System 11 (X11) 7.x
|
| | CVE reference: | CVE-2007-1003 (Secunia mirror)
CVE-2007-1351 (Secunia mirror)
CVE-2007-1352 (Secunia mirror)
CVE-2007-1667 (Secunia mirror)
|
|
|
|
|
|
Description:
Some vulnerabilities have been reported in X.Org X11, which potentially can be exploited by malicious, local users to disclose sensitive information, cause a DoS (Denial of Service), and gain escalated privileges.
1) An integer overflow exists within the parsing of BDF fonts. This can be exploited to cause a heap-based buffer overflow via a specially crafted BDF font.
Successful exploitation may allow the execution of arbitrary code with escalated privileges.
2) An integer overflow exists within the parsing of the "fonts.dir" fonts information file. This can be exploited to cause a heap-based buffer overflow via a specially crafted fonts information file that specifies an element count of more than 1,073,741,824 in the first line.
Successful exploitation may allow the execution of arbitrary code with escalated privileges.
3) An input validation error exists within the "ProcXCMiscGetXIDList()" function of the XC-MISC extension. This can be exploited to cause a stack-based (if the "alloca()" function is available) or heap-based memory corruption by passing specially crafted parameters to the function.
Successful exploitation may allow the execution of arbitrary code with escalated privileges.
4) Integer overflows exists within the "XGetPixel()" function in ImUtil.c. This can be exploited to cause a crash or disclose potentially sensitive information by passing specially crafted parameters to the function.
Vulnerabilities #1 and #2 are reported in X.Org X11R7.1, vulnerability #3 is reported in X.org server version 7.1-1.1.0, and vulnerability #4 is reported in libX11 version 1.0.3. Other versions may also be affected.
Solution:
Apply patches.
http://xorg.freedesktop.org/archive/X11R7.2/patches/
Provided and/or discovered by:
1, 2) Greg MacManus, iDefense Labs
3) Sean Larsson, iDefense Labs
4) Sami Liedes
Changelog:
2007-04-25: Updated "Solution" section. Added link to "Original Advisory" section.
Original Advisory:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=501
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=502
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=503
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=414045
http://lists.freedesktop.org/archives/xorg-announce/2007-April/000286.html
|
|
|
|
|
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
|
|
|
|
17 Related Secunia Security Advisories, displaying 10
|
|
|
1. X.org X11 Multiple Vulnerabilities
|
|
2. X.org X11 Multiple Vulnerabilities
|
|
3. X.Org X11 X Font Server Multiple Vulnerabilities
|
|
4. X.org X11 Composite Pixmap Privilege Escalation Vulnerability
|
|
5. X.Org X11 "DBE" and "Render" Extensions Vulnerabilities
|
|
6. libX11 XCOMPOSEFILE File Descriptor Leak
|
|
7. X.Org X11 X Display Manager "Xsession" Script Security Issue
|
|
8. X11 libXfont CID Encoded Fonts Integer Overflows
|
|
9. X11 "_XKB_CHARSET" Buffer Overflow Vulnerability
|
|
10. X.Org X11 setuid Security Issues
|
Show all related advisories
|
|
|
Send Feedback to Secunia
|
|
If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
Ideas, suggestions, and other feedback are most welcome.
|
|
|
|
|
|
Secunia PSI
Scan | Patch | Track
Free Download
|
|
|
Secunia Poll
|
|
|
|
|
 |
|
|
Most Popular Advisories
|
|
|
|
|
|
