CVE-2015-3218

Local privilege escalation in polkit before 0.113 due to predictable authentication session cookie values (CVE-2015-4625).

Various memory corruption vulnerabilities in polkit before 0.113 in the use of the JavaScript interpreter, possibly leading to local privilege escalation (CVE-2015-3256).

Memory corruption vulnerability in polkit before 0.113 in handling duplicate action IDs, possibly leading to local privilege escalation (CVE-2015-3255).

Denial of service issue in polkit before 0.113 which allowed any local user to crash polkitd (CVE-2015-3218).

These are all security issues fixed in the libpolkit0-0.113-3.4 package on the GA media of openSUSE Tumbleweed.

polkit was updated to the 0.113 release, fixing security issues and bugs.

Security issues fixed:

• Fixes CVE-2015-4625, a local privilege escalation due to predictable authentication session cookie values. Thanks to Tavis Ormandy, Google Project Zero for reporting this issue. For the future, authentication agents are encouraged to use PolkitAgentSession instead of using the D-Bus agent response API directly. (bsc#935119)
• Fixes CVE-2015-3256, various memory corruption vulnerabilities in use of the JavaScript interpreter, possibly leading to local privilege escalation. (bsc#943816)
• Fixes CVE-2015-3255, a memory corruption vulnerability in handling duplicate action IDs, possibly leading to local privilege escalation. Thanks to Laurent Bigonville for reporting this issue. (bsc#939246)
• Fixes CVE-2015-3218, which allowed any local user to crash polkitd. Thanks to Tavis Ormandy, Google Project Zero, for reporting this issue. (bsc#933922)

Other issues fixed:

• On systemd-213 and later, the 'active' state is shared across all sessions of an user, instead of being tracked separately.
• pkexec, when not given a program to execute, runs the users shell by default.
• Fixed shutdown problems on powerpc64le (bsc#950114)
• polkit had a memory leak (bsc#912889)

The authentication_agent_new function in polkitbackend/polkitbackendinteractiveauthority.c in PolicyKit (aka polkit) before 0.113 allows local users to cause a denial of service (NULL pointer dereference and polkitd daemon crash) by calling RegisterAuthenticationAgent with an invalid object path.

Tavis Ormandy discovered that PolicyKit incorrectly handled certain invalid object paths. A local attacker could possibly use this issue to cause PolicyKit to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2015-3218)

It was discovered that PolicyKit incorrectly handled certain duplicate action IDs. A local attacker could use this issue to cause PolicyKit to crash, resulting in a denial of service, or possibly escalate privileges. This issue only affected Ubuntu 14.04 LTS. (CVE-2015-3255)

Tavis Ormandy discovered that PolicyKit incorrectly handled duplicate cookie values. A local attacker could use this issue to cause PolicyKit to crash, resulting in a denial of service, or possibly escalate privileges. This issue only affected Ubuntu 14.04 LTS. (CVE-2015-4625)

Matthias Gerstner discovered that PolicyKit incorrectly checked users. A local attacker could possibly use this issue to cause authentication dialogs to show up for other users, leading to a denial of service or an information leak. (CVE-2018-1116)