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>> Ruby Net::HTTPS Library Common Name Verification Security Weakness

Title : Ruby Net::HTTPS Library Common Name Verification Security Weakness
VUPEN ID : VUPEN/ADV-2007-3340
CVE ID : CVE-2007-5162
Rated as : Low Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2007-10-03


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

A weakness has been identified in Ruby, which could be exploited to conduct spoofing attacks. This issue is caused by an error in the Net::HTTPS library that fails to properly validate the common name within SSL certificates against the hostname of the server, which could be exploited by attackers to present a cryptographically valid certificate with an invalid CN and spoof an arbitrary web site.

Affected Products

Ruby version 1.8.6 and prior

Solution

Fixes are available via SVN :
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=13499
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=13500
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=13502
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=13504

References

http://www.vupen.com/english/advisories/2007/3340
http://www.isecpartners.com/advisories/2007-006-rubyssl.txt

Credits

Vulnerability reported by Chris Clark (iSEC Partners).

ChangeLog

2007-10-03 : Initial release

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