CVE-2024-27354 Affecting phpseclib package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Mar 2025
- disclosed1 Mar 2024
Introduced: 1 Mar 2024
CVE-2024-27354 (opens in a new tab)How to fix?
There is no fixed version for Ubuntu:20.04 phpseclib.
NVD Description
Note: Versions mentioned in the description apply only to the upstream phpseclib package and not the phpseclib package as distributed by Ubuntu.
See How to fix? for Ubuntu:20.04 relevant fixed versions and status.
An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. An attacker can construct a malformed certificate containing an extremely large prime to cause a denial of service (CPU consumption for an isPrime primality check). NOTE: this issue was introduced when attempting to fix CVE-2023-27560.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2024-27354
- https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b
- https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49
- https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html
- https://lists.debian.org/debian-lts-announce/2024/03/msg00003.html