CVE-2020-16119 DCCP CCID structure use-after-free
Local attackers can exploit a use-after-free in the Linux kernel DCCP implementation to achieve privilege escalation or code execution.
- 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-2020-16119?
CVE-2020-16119 is a medium-severity use after free vulnerability in Canonical Ubuntu Linux, published on 14 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196.
Weakness: CWE-416
Which versions are affected by CVE-2020-16119?
It affects 3 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.
How do I fix CVE-2020-16119?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-16119 being exploited?
There is no known exploitation of CVE-2020-16119 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2020-16119, GHSA-fgjc-j4q7-m9gg, UBUNTU-CVE-2020-16119, USN-4580-1.