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CUPS Print Queue Security Bypass and Logfile Credentials Disclosure
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Secunia Advisory:
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SA12736
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Release Date:
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2004-10-06
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Last Update:
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2005-07-15
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Popularity:
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11,844 views
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Critical:
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Less critical
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Impact:
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Security Bypass
Exposure of sensitive information
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| Software: | CUPS 1.x
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| CVE reference: | CVE-2004-0923
CVE-2004-2154
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Description:
Two vulnerabilities have been reported in CUPS, which can be exploited by malicious, local users to gain knowledge of sensitive information, or by malicious users to bypass certain security restrictions.
1) User credentials are stored in the "error_log" log file when printing to a shared printer via Samba. This discloses user names and passwords to local users.
2) CUPS scheduler uses case-sensitive string comparison on a queue name in "cupsd.conf" to determine how to authenticate a user. However, queue names are not case-sensitive. This can be exploited by unauthorized users to print to a password-protected queue by specifying the queue name using letters in a different case.
Solution:
Update to version 1.1.22rc1 or later.
Provided and/or discovered by:
1) Gary Smith
2) adji.df.uba
Changelog:
2004-11-20: Added link to US-CERT vulnerability note.
2005-07-15: Updated advisory to include print queue security bypass vulnerability.
Original Advisory:
http://www.cups.org/str.php?L920
http://www.cups.org/str.php?L700
Other References:
US-CERT VU#557062:
http://www.kb.cert.org/vuls/id/557062
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