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BlackBerry 4.x Dialog Box Certificate Mismatch

Medium

Synopsis

The remote host is affected by a certificate mismatch vulnerability.

Description

The included browser in versions of BlackBerry OS 4.5.0 before 4.5.0.173, 4.6.0 before 4.6.0.303, 4.6.1 before 4.6.1.309, 4.7.0 before 4.7.0.179, and 4.7.1 before 4.7.1.57 does not properly handle "hidden" characters including a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows remote man-in-the-middle attackers to deceive a user into believing they are accessing a trusted site.

Solution

Upgrade the BlackBerry to 4.7.1.57, or later. If 4.7.x cannot be installed, versions 4.5.0.173, 4.6.0.303, 4.6.1.309, and 4.7.0.179 are also patched for this vulnerability.