Stack-based buffer overflow in op before Changeset 563, when xauth support is enabled, allows local users to gain privileges via a long XAUTHORITY environment variable.Referenceshttps://exchange.xforce.ibmcloud.com/vulnerabilities/43836http://www.securityfocus.com/bid/30226http://swapoff.org/changeset/563http://secunia.com/advisories/31103http://www.openwall.com/lists/oss-security/2008/07/12/4