CVE-2020-13776 Privilege escalation in n/a
systemd mishandles numerical usernames, allowing attackers to gain root privileges when lower-privilege user access was intended.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-13776?
CVE-2020-13776 is a medium-severity vulnerability in Fedoraproject Fedora, published on 3 Jun 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082.
Weakness: CWE-269
Which versions are affected by CVE-2020-13776?
It affects 4 products.
Products include Fedoraproject Fedora, Netapp Active Iq Unified Manager, Netapp Solidfire \& Hci Management Node, Systemd Project Systemd.
How do I fix CVE-2020-13776?
Apply the vendor's patch.
Is CVE-2020-13776 being exploited?
There is no known exploitation of CVE-2020-13776 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as DEBIAN-CVE-2020-13776, GHSA-g2fm-j5p3-x5h7, MGASA-2021-0304, OESA-2022-1538, UBUNTU-CVE-2020-13776.