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mod_ssl "SSLVerifyClient" Security Bypass Security Issue
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Secunia Advisory:
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SA16700
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Release Date:
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2005-09-05
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Last Update:
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2005-10-14
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Popularity:
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22,811 views
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Critical:
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Moderately critical
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Impact:
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Security Bypass
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Apache 2.0.x
mod_ssl 2.x
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2005-2700
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Description:
A security issue has been reported in mod_ssl, which potentially can be exploited by malicious people to bypass certain security restrictions.
The security issue is caused due to an error in enforcing client-based certificate authentication ("SSLVerifyClient require") in per-location context, if "SSLVerifyClient optional" was configured in the global virtual host configuration. This may allow malicious people to bypass client-based certificate authentication and gain unauthorised access to certain web pages.
Solution:
mod_ssl 2.x:
Update to version 2.8.24.
http://www.modssl.org/source/mod_ssl-2.8.24-1.3.33.tar.gz
Apache 2.0.x:
Update to version 2.0.55.
http://httpd.apache.org/download.cgi
Provided and/or discovered by:
Reported by vendor.
Changelog:
2005-09-26: Added link to US-CERT vulnerability note.
2005-10-14: Apache version 2.0.55 released. Updated "Solution" and "Original Advisory" sections.
Original Advisory:
Apache.org:
http://www.apache.org/dist/httpd/Announcement2.0.html
Other References:
US-CERT VU#744929:
http://www.kb.cert.org/vuls/id/744929
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