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Secunia Advisory SA19331

Debian Network Installation Insecure Default Directory Permissions
Secunia Advisory SA19331
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Release Date 2006-03-23
Last Update 2006-03-27
   
Popularity 8,684 views
Comments 0 comments

Criticality level Not criticalNot critical
Impact Security Bypass
DoS
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
   
Operating System
Debian GNU/Linux 3.1
Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2006-1376 CVSS available in Customer Area
  

Description
Ferenczi Viktor has discovered a weakness in Debian, which can be exploited by malicious, local users to bypass certain security restrictions and potentially cause a DoS (Denial of Service).

The weakness is caused due to the "/var/log/debian-installer/cdebconf" directory being left behind with world-writable permissions after completion of installation using the network install CD. This can potentially be exploited by malicious users to cause a DoS by e.g. filling up the /var/log partition.

The vulnerability has been confirmed in debian-31r1a-i386-netinst.iso and also reported in version 3.1r1. Other versions may also be affected.

Solution
Configure appropriate permissions for the "/var/log/debian-installer/cdebconf" directory.

Provided and/or discovered by
Ferenczi Viktor

Changelog
Further details available in Customer Area

Original Advisory
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=358210

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: Debian Network Installation Insecure Default Directory Permissions
 
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