Tor before 0.1.1.20 uses improper logic to validate the "OR" destination, which allows remote attackers to perform a man-in-the-middle (MITM) attack via unspecified vectors.Referenceshttp://secunia.com/advisories/20514http://security.gentoo.org/glsa/glsa-200606-04.xmlhttp://tor.eff.org/cvs/tor/ChangeLoghttp://www.osvdb.org/25878