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Category:   Application (Generic)  >   Perl Vendors:   Wall, Larry
Perl IO::Socket::SSL Certificate Validation Bug Lets Remote Users Bypass Security Restrictions
SecurityTracker Alert ID:  1022519
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jul 7 2009
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): IO::Socket::SSL prior to 1.26
Description:   A vulnerability was reported in Perl IO::Socket::SSL. A remote user can bypass security restrictions.

The verify_hostname_of_cert() function incorrectly matches only the hostname prefix when no wildcard is supplied. As a result, a remote user can supply a specially crafted certificate hostname value to spoof a target site's certificate.

MLEHMANN reported this vulnerability.

Impact:   A remote user can spoof a target site's certificate.
Solution:   The vendor has issued a fix (IO::Socket::SSL 1.26).

The vendor's advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.

 Source Message Contents

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