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X11 libXfont PCF Integer Overflow Vulnerability Advisory Available in Danish 

Secunia Advisory: SA21450  
Release Date: 2006-08-11

Critical:
Moderately critical
Impact: DoS
System access
Where: From remote
Solution Status: Unpatched

Software:X Window System 11 (X11) 6.x
X Window System 11 (X11) 7.x

This advisory is currently marked as unpatched!
- Companies can be alerted when a patch is released!


Description:
A vulnerability has been reported in libXfont, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise an application using the library.

The vulnerability is caused due to integer overflows within the PCF font file parser. This can potentially be exploited to cause a heap-based buffer overflow via a specially crafted font file.

This is related to:
SA20100

Successful exploitation may allow execution of arbitrary code.

Solution:
Apply patch.
http://bugs.freedesktop.org/attachment.cgi?id=6231

Original Advisory:
https://bugs.freedesktop.org/show_bug.cgi?id=7535

Other References:
SA20100:
http://secunia.com/advisories/20100/



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 Multiple Vulnerabilities
6. X.Org X11 "DBE" and "Render" Extensions Vulnerabilities
7. libX11 XCOMPOSEFILE File Descriptor Leak
8. X.Org X11 X Display Manager "Xsession" Script Security Issue
9. X11 libXfont CID Encoded Fonts Integer Overflows
10. X11 "_XKB_CHARSET" Buffer Overflow Vulnerability

Show all related advisories


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