CVE-2024-27354 Affecting phpseclib package, versions <1.0.20-1+deb12u2
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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Test your applications- Snyk IDSNYK-DEBIAN12-PHPSECLIB-6282752
- published28 Feb 2024
- disclosed1 Mar 2024
Introduced: 28 Feb 2024
CVE-2024-27354 (opens in a new tab)How to fix?
Upgrade Debian:12 phpseclib to version 1.0.20-1+deb12u2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream phpseclib package and not the phpseclib package as distributed by Debian.
See How to fix? for Debian:12 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
- https://security-tracker.debian.org/tracker/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