CVE-2016-8655 Race condition in n/a
Local attackers with CAP_NET_RAW can exploit a race condition in the Linux kernel packet socket implementation to gain privileges or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-8655?
CVE-2016-8655 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 8 Dec 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Race condition in net/packet/af_packet.c in the Linux kernel through 4.8.12 allows local users to gain privileges or cause a denial of service (use-after-free) by leveraging the CAP_NET_RAW capability to change a socket version, related to the packet_set_ring and packet_setsockopt functions.
Which versions are affected by CVE-2016-8655?
It affects 2 products.
Linux distribution packages (15)
kernel-rt Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-debug Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-debug-debuginfo Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-debug-devel Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-debuginfo Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-debuginfo-common-x86_64 Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-devel Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-doc Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-firmware Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-trace Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-trace-debuginfo Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-trace-devel Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-vanilla Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-vanilla-debuginfo Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
kernel-rt-vanilla-devel Red Hat:enterprise_mrg:2:server:el6 | All versions | 1:3.10.0-514.rt56.215.el6rt |
Products include Canonical Ubuntu Linux, Linux kernel.
How do I fix CVE-2016-8655?
Apply the vendor's patch.
Is CVE-2016-8655 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-8655 exists.
Public exploit code: 1 Metasploit module, 4 Exploit-DB entries and 6 proofs of concept on GitHub.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2016-8655, GHSA-3x7h-7xqw-rj45, RHSA-2017:0402, UBUNTU-CVE-2016-8655, USN-3149-1, USN-3151-1 and 3 more.