Netegrity SiteMinder Authentication Bypass Vulnerability
BID:1681
Info
Netegrity SiteMinder Authentication Bypass Vulnerability
| Bugtraq ID: | 1681 |
| Class: | Input Validation Error |
| CVE: | |
| Remote: | Yes |
| Local: | Yes |
| Published: | Sep 11 2000 12:00AM |
| Updated: | Sep 11 2000 12:00AM |
| Credit: | Publicized in an @Stake advisory released September 11, 2000. |
| Vulnerable: |
Netegrity SiteMinder 4.0 Netegrity SiteMinder 3.6 |
| Not Vulnerable: | |
Discussion
Netegrity SiteMinder Authentication Bypass Vulnerability
Netegrity's SiteMinder software is designed to provide access control to webpages at the server. It is possible, with a specially modified URL, for unauthenticated clients to gain read and/or execute access to protected content.
If the URL is modified by adding the string '/$/nonexistantfile.ext' after the desired URL, the server will pass the requested content without prompting for or requiring any authentication whatsoever. The extension of the non-existant file is checked, and so far only .ccc, .class, and .jpg have been proven to work.
If the restricted content is a cgi application, variable values are specified after the added string. If no values are specified, the server will return the source of the cgi.
Netegrity's SiteMinder software is designed to provide access control to webpages at the server. It is possible, with a specially modified URL, for unauthenticated clients to gain read and/or execute access to protected content.
If the URL is modified by adding the string '/$/nonexistantfile.ext' after the desired URL, the server will pass the requested content without prompting for or requiring any authentication whatsoever. The extension of the non-existant file is checked, and so far only .ccc, .class, and .jpg have been proven to work.
If the restricted content is a cgi application, variable values are specified after the added string. If no values are specified, the server will return the source of the cgi.
Exploit / POC
Netegrity SiteMinder Authentication Bypass Vulnerability
see discussion
see discussion
Solution / Fix
Netegrity SiteMinder Authentication Bypass Vulnerability
Solution:
Netegrity has released an upgrade (version 4.11) that addresses this issue, and is the current shipping version. However, the upgrade still does not properly protect content that has no extension in the filename. This content will still be vulnerable to the same disclosure method. To address this, users of SiteMinder should apply the patch or upgrade and then rename any affected files, ading an extension.
The upgrade and patches are available from Netegrity's support site at:
http://www.netegrity.com/services/online/
A valid customer ID and password is required. Netegrity customer service can also be reached by telephone at (800)-325-9870
Solution:
Netegrity has released an upgrade (version 4.11) that addresses this issue, and is the current shipping version. However, the upgrade still does not properly protect content that has no extension in the filename. This content will still be vulnerable to the same disclosure method. To address this, users of SiteMinder should apply the patch or upgrade and then rename any affected files, ading an extension.
The upgrade and patches are available from Netegrity's support site at:
http://www.netegrity.com/services/online/
A valid customer ID and password is required. Netegrity customer service can also be reached by telephone at (800)-325-9870
References
Netegrity SiteMinder Authentication Bypass Vulnerability
References:
References:
- Online Customer Support (Netegrity)
- SiteMinder Product Page (Netegrity)