Debian Linux Security Advisory 3414-1 – Multiple security issues have been found in the Xen virtualisation solution, which may result in denial of service or information disclosure.

Debian Linux Security Advisory 3415-1 – Several vulnerabilities have been discovered in the chromium web browser.

Cisco Security Advisory – A vulnerability in Cisco Prime Collaboration Assurance (PCA) Software could allow an unauthenticated, remote attacker to log in to the system shell with the default cmuser user account and access the shell with a limited set of permissions. The vulnerability is due to an undocumented account that has a default and static password. This account is created during installation and cannot be changed or deleted without impacting the functionality of the system. The first time this account is used the system will request that the user change the default password. An attacker could exploit this vulnerability by remotely connecting to the affected system via SSH by using the undocumented account. Successful exploitation could allow the attacker to access the system with the privileges of the cmuser user. This vulnerability allows the attacker to: access some sensitive data, such as the password file, system logs, and Cisco PCA database information; modify some data; run some internal executables; and potentially make the system unstable or inaccessible. Cisco has released software updates that address this vulnerability. Workarounds are available.

Cisco Security Advisory – A vulnerability in the Java deserialization used by the Apache Commons Collections (ACC) library could allow an unauthenticated, remote attacker to execute arbitrary code. The vulnerability is due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit this vulnerability by submitting crafted input to an application on a targeted system that uses the ACC library. After the vulnerable library on the affected system deserializes the content, the attacker could execute arbitrary code on the system, which could be used to conduct further attacks. Cisco will release software updates that address this vulnerability. There are no workarounds that mitigate this vulnerability.

Apple Security Advisory 2015-12-08-4 – watchOS 2.1 is now available and addresses 30 security issues.

Apple Security Advisory 2015-12-08-2 – tvOS 9.1 is now available and addresses 48 security issues.

Apple Security Advisory 2015-12-08-3 – OS X El Capitan 10.11.2 and Security Update 2015-008 is now available and addresses 54 vulnerabilities.

Apple Security Advisory 2015-12-08-6 – Xcode 7.2 is now available and addresses four vulnerabilities.

Apple Security Advisory 2015-12-08-5 – Safari 9.0.2 is now available and addresses a dozen vulnerabilities.

Apple Security Advisory 2015-12-08-1 – iOS 9.2 is now available and addresses at least 50 security vulnerabilities.