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Insecure Library Loading

Secunia Advisory SA21428

LessTif "DEBUG_FILE" Privilege Escalation Vulnerability
Secunia Advisory SA21428
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Release Date 2006-08-09
Last Update 2006-08-18
   
Popularity 8,850 views
Comments 0 comments

Criticality level Less criticalLess critical
Impact Privilege escalation
Where Local system
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Unpatched
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
Remediation status Secunia VIM
   
Software:
LessTif 0.x
Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2006-4124 CVSS available in Customer Area
  

Description

Karol Wiesek has reported a vulnerability in LessTif, which can be exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to the libXm library allowing users to specify a file for writing debug output to via the "DEBUG_FILE" environment variable. By running a setuid binary linked against a vulnerable libXm library, this can be exploited to create world-writable files with the effective user id of the binary.


Solution
Restrict permission to execute setuid binaries linked against libXm to trusted users only.

Provided and/or discovered by
Karol Wiesek

Changelog
Further details available in Customer Area

Original Advisory
http://karol.wiesek.pl/files/lesstif-advisory.pdf

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: LessTif "DEBUG_FILE" Privilege Escalation Vulnerability
 
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