Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2021-21956

Deserialization of Untrusted Data

Published: Apr 14, 2022 | Modified: Nov 21, 2024
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
9.3 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-21956
CWEhttps://cwe.mitre.org/data/definitions/502.html

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

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Imunify360 Cloudlinux 5.8 (including) 5.8 (including)
Imunify360 Cloudlinux 5.9 (including) 5.9 (including)
Imunify360 Cloudlinux 5.10.2 (including) 5.10.2 (including)

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
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