Cisco CallManager 5.1.1.3000-5 does not verify the Digest authentication header URI against the Request URI in SIP messages, which allows remote attackers to use sniffed Digest authentication credentials to call arbitrary telephone numbers or spoof caller ID (aka "toll fraud and authentication forward attack").
https://exchange.xforce.ibmcloud.com/vulnerabilities/37197
http://www.vupen.com/english/advisories/2007/3534
http://www.securityfocus.com/bid/26057
http://secunia.com/advisories/27231
http://lists.grok.org.uk/pipermail/full-disclosure/2007-October/066694.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-October/066691.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-October/066581.html