|
X.Org X11 X Font Server Multiple Vulnerabilities
|
|
|
|
|
Secunia Advisory:
|
SA27040
|
|
|
Release Date:
|
2007-10-03
|
|
Last Update:
|
2007-10-04
|
|
|
Critical:
|
Less critical
|
|
Impact:
|
Privilege escalation
|
|
Where:
|
Local system
|
|
Solution Status:
|
Vendor Patch
|
|
| Software: | X Window System 11 (X11) 6.x
X Window System 11 (X11) 7.x
|
| | CVE reference: | CVE-2007-4568 (Secunia mirror)
CVE-2007-4989 (Secunia mirror)
CVE-2007-4990 (Secunia mirror)
|
|
|
Want to know the next time vulnerabilities are fixed in this product?
- Companies can be alerted via email and SMS! |
|
|
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.
2007-10-04: Added CVE references.
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
|
|
|
|
|
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 Composite Pixmap Privilege Escalation Vulnerability
|
|
4. X.Org X11 Multiple Vulnerabilities
|
|
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.
|
|
|
|
