CVE-2009-4028

The vio_verify_callback function in viosslfactories.c in MySQL 5.0.x before
5.0.88 and 5.1.x before 5.1.41, when OpenSSL is used, accepts a value of
zero for the depth of X.509 certificates, which allows man-in-the-middle
attackers to spoof arbitrary SSL-based MySQL servers via a crafted
certificate, as demonstrated by a certificate presented by a server linked
against the yaSSL library.

Bugs

• <http://bugs.mysql.com/47320&gt;
• <https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-4028&gt;

Notes