IO::Socket::SSL: Certificate validation error

1. Gentoo Linux Security Advisory

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-perl/IO-Socket-SSL	< 1.26	>= 1.26	All supported architectures

Related bugreports: #276360

An error in the hostname matching of IO::Socket::SSL might enable remote attackers to conduct man-in-the-middle attacks.

2. Impact Information

IO::Socket::SSL is a Perl class implementing an object oriented interface to SSL sockets.

The vendor reported that IO::Socket::SSL does not properly handle Common Name (CN) fields.

A remote attacker might employ a specially crafted certificate to conduct man-in-the-middle attacks on SSL connections made using IO::Socket::SSL.

3. Resolution Information

There is no known workaround at this time.

All IO::Socket::SSL users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-perl/IO-Socket-SSL-1.26"

4. References

Page updated January 16, 2011

Summary: This is a Gentoo Linux Security Advisory

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