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Shadow "passwd_check()" Security Bypass Vulnerability

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Release Date:  2004-10-29    Last Update:  2004-11-10    Views:  15,248

Secunia Advisory SA13028

Where:

Local system

Impact:

Security Bypass

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Martin Schulze has reported a vulnerability in Shadow, which can be exploited by malicious, local users to bypass certain security restrictions.

The vulnerability is caused due to an input validation error in the function "passwd_check()" in "libmisc/pwdcheck.c", which is used by the "chfn" and "chsh" utilities.

Successful exploitation allows unauthorised modification of account properties.

The vulnerability has been reported in version 4.0.4.1. Other versions may also be affected.


Solution:
Update to version 4.0.6.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Martin Schulze

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 "passwd_check()" Security Bypass Vulnerability

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