Aptdaemon 0.43 and earlier in Ubuntu 11.04, 11.10, and 12.04 LTS does not authenticate packages when the transaction is not simulated, which allows remote attackers to install arbitrary packages via a man-in-the-middle attack.Referenceshttp://www.securityfocus.com/bid/52855https://bugs.launchpad.net/ubuntu/%2Bsource/aptdaemon/%2Bbug/959131http://www.osvdb.org/80887http://ubuntu.com/usn/usn-1414-1https://exchange.xforce.ibmcloud.com/vulnerabilities/74553http://secunia.com/advisories/48688
