CVE-2021-20264 Privilege escalation in containers/openjdk
An attacker with container access can modify /etc/passwd to escalate privileges due to insecure file permissions in OpenJDK containers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20264?
CVE-2021-20264 is a high-severity vulnerability in Oracle Openjdk, published on 6 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An insecure modification flaw in the /etc/passwd file was found in the openjdk-1.8 and openjdk-11 containers. This flaw allows an attacker with access to the container to modify the /etc/passwd and escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Which versions are affected by CVE-2021-20264?
It affects 1 product.
Products include Oracle Openjdk.
How do I fix CVE-2021-20264?
No fix has been published for CVE-2021-20264 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-20264 being exploited?
There is no known exploitation of CVE-2021-20264 in the wild and no public exploit code.
Other vulnerabilities in Oracle Openjdk
Sources
Also known as GHSA-gx4p-prhw-c28v.