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PerlBLOG Multiple Vulnerabilities
Secunia Advisory: SA18924
Release Date: 2006-02-17
Last Update: 2006-02-23
Popularity: 6,545 views

Critical:
Moderately critical
Impact: Security Bypass
Cross Site Scripting
Where: From remote
Solution Status: Unpatched

Software:PerlBLOG 1.x

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CVE reference:CVE-2006-0780
CVE-2006-0781
CVE-2006-0782


Description:
Aliaksandr Hartsuyeu has reported some vulnerabilities in PerlBLOG, which can be exploited by malicious people to conduct script insertion attacks and to bypass certain security restrictions.

1) Input passed to the "reply" parameter in weblog.pl within the "Post Comment" functionality isn't properly sanitised before bring used to create files. This can be exploited to create files containing values from the "name" and "body" parameter in arbitrary directories accessible by the web server

2) Input passed to the "month" parameter in weblog.pl within the "Archives" functionality isn't properly santised before being used to display ".txt" files. This can be exploited to disclose contents of certain ".txt" files.

3) Input passed to the "name" and "body" parameter in weblog.pl isn't properly santised before being saved as a comment. This can be exploited to execute arbitrary script code in a user's browser session in context of an affected website when a malicious comment entry is viewed.

The vulnerabilities have been reported in version 1.08, 109, and 1.09b. Other versions may also be affected.

Solution:
Edit the source code to ensure that input is properly sanitised.

Provided and/or discovered by:
Aliaksandr Hartsuyeu

Changelog:
2006-02-17: Updated "Description" section.
2006-02-23: Added CVE references.

Original Advisory:
http://evuln.com/vulns/81/summary.html


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