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Insecure Library Loading
Less critical

shadow setuid Vulnerability

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Release Date:  2006-07-06    Last Update:  2006-07-12    Views:  10,888

Secunia Advisory SA20950

Where:

Local system

Impact:

Privilege escalation

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Ilja van Sprundel reported a vulnerability in the passwd application of shadow, which potentially can be exploited by malicious, local users to perform certain actions with escalated privileges.

The vulnerability is due to missing checks in passwd for whether the "setuid()" call has succeeded, when started with the -f, -g, or -s option. This can potentially be exploited to launch chfn, chsh, or gpasswd with root privileges, which may allow the user to perform certain actions as the root user.

Successful exploitation allows to perform certain actions with escalated privileges, but requires that PAM is configured with a maximum number of user processes.

This vulnerability was reported in version 4.0.3 and 4.0.13. Prior versions may be also affected.


Solution:
Update to version 4.0.14 or later.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Ilja van Sprundel

Original Advisory:
http://www.ubuntu.com/usn/usn-308-1

Deep Links:
Links available to Secunia VIM customers

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: shadow setuid Vulnerability

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