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shadow setuid Vulnerability
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Secunia Advisory:
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SA20950
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Release Date:
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2006-07-06
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Last Update:
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2006-07-12
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Critical:
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Less critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| Software: | Shadow 4.x
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| | CVE reference: | CVE-2006-3378 (Secunia mirror)
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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.
ftp://ftp.pld.org.pl/software/shadow/
Provided and/or discovered by:
Ilja van Sprundel
Changelog:
2006-07-12: Added CVE reference.
Original Advisory:
http://www.ubuntu.com/usn/usn-308-1
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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2 Related Secunia Security Advisories
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1. Shadow "useradd.c" Insecure Mailbox File Permissions
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2. Shadow "passwd_check()" Security Bypass Vulnerability
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If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
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