CVE-2021-21956 Deserialization in Imunify360
An attacker can achieve arbitrary command execution by providing a malicious file to the Ai-Bolit functionality in Imunify360.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21956?
CVE-2021-21956 is a high-severity unsafe deserialization vulnerability in CloudLinux Inc Imunify360, published on 14 Apr 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A php unserialize vulnerability exists in the Ai-Bolit functionality of CloudLinux Inc Imunify360 5.10.2. A specially-crafted malformed file can lead to potential arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Weakness: CWE-502
Which versions are affected by CVE-2021-21956?
It affects 1 product.
Products include Cloudlinux Imunify360.
How do I fix CVE-2021-21956?
No fix has been published for CVE-2021-21956 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2021-21956 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21956 exists.
Sources
Also known as GHSA-q66p-gvmf-c9v2.