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AUSCERT External Security Bulletin Redistribution
ESB-2008.0455 -- [Win][UNIX/Linux]
cPanel XSRF vulnerabilities
5 May 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: cPanel
Publisher: US-CERT
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact: Cross-site Request Forgery
Access: Remote/Unauthenticated
CVE Names: CVE-2008-2043
Original Bulletin: http://www.kb.cert.org/vuls/id/584089
Revision History: May 5 2008: Added CVE
May 2 2008: Initial Release
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Vulnerability Note VU#584089
cPanel XSRF vulnerabilities
Overview
cPanel contains multiple cross-site request forgery (XSRF) vulnerabilities.
If successfully exploited, these vulnerabilities may allow an attacker to
execute arbitrary commands.
I. Description
cPanel is a web-based tool that is designed to automate and control web sites
and servers.
cPanel contains multiple cross-site request forgery (XSRF) vulnerabilities.
These vulnerabilities may be triggered by a remote attacker who convinces an
administrator to browse to a malicious web site while logged into their
cPanel account.
II. Impact
An attacker may be able to take actions that only authorized administrators
should be able to execute.
III. Solution
We are currently unaware of a practical solution to this problem.
Enable referrer checking
Referrer checking may mitigate some XSRF attacks. To enable referrer checking,
follow the below steps. Note that referrer checking may cause some
applications to fail.
1. navigate to Server configuration
2. go to Tweak Settings
3. go to Security in WebHost Manager
4. check the box and save the page
Do not browse to untrusted sites
Administrators can mitigate XSRF vulnerabilities in cPanel and other
browser-based tools by not browsing to untrusted websites while logged into
their account.
Systems Affected
Vendor Status Date Updated
cPanel Inc. Vulnerable 28-Apr-2008
References
http://www.rooksecurity.com/blog/?p=7
http://changelog.cpanel.net/
http://www.owasp.org/index.php/Cross-Site_Request_Forgery
http://en.wikipedia.org/wiki/XSRF
Credit
Thanks to Michael Brooks for information that was used in this report.
This document was written by Ryan Giobbi.
Other Information
Date Public 01/05/2008
Date First Published 30/04/2008 15:47:27
Date Last Updated 01/05/2008
CERT Advisory
CVE Name
US-CERT Technical Alerts
Metric 2.25
Document Revision 15
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