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Squid Username Whitespace Security Bypass Issue
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Secunia Advisory:
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SA13843
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Release Date:
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2005-01-19
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Last Update:
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2005-02-07
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Popularity:
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10,519 views
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Critical:
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Less critical
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Impact:
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Security Bypass
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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: | Squid 2.x
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2005-0173
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Description:
A security issue has been reported in Squid, which can be exploited by malicious users to bypass certain security restrictions.
The issue is caused due to some LDAP implementations ignoring leading/trailing whitespaces in usernames. This can be exploited to bypass certain ACLs based on usernames or trick some log analysis by supplying a username with a whitespace in the beginning or end during the authentication process.
The vulnerability has been reported in version 2.5 and prior.
Solution:
Apply patch for 2.5.STABLE7:
http://www.squid-cache.org/Versions/v...s/squid-2.5.STABLE7-ldap_spaces.patch
Provided and/or discovered by:
Reported by vendor.
Changelog:
2005-02-03: Added CVE reference.
2005-02-07: Added link to US-CERT vulnerability note.
Original Advisory:
http://www.squid-cache.org/Versions/v2/2.5/bugs/#squid-2.5.STABLE7-ldap_spaces
Other References:
US-CERT VU#924198:
http://www.kb.cert.org/vuls/id/924198
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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