w3m: Format string vulnerability

w3m: Format string vulnerability w3m does not correctly handle format string specifiers in SSL certificates. w3m 2007-01-12 2007-01-12 159145 remote 0.5.1-r4 0.5.1-r4

w3m is a multi-platform text-based web browser.

w3m in -dump or -backend mode does not correctly handle printf() format string specifiers in the Common Name (CN) field of an X.509 SSL certificate.

An attacker could entice a user to visit a malicious website that would load a specially crafted X.509 SSL certificate containing "%n" or other format string specifiers, possibly resulting in the execution of arbitrary code with the rights of the user running w3m.

There is no known workaround at this time.

All w3m users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-client/w3m-0.5.1-r4"

CVE-2006-6772 aetius DerCorny