CVE-2024-27354 Affecting php-phpseclib3 package, versions <3.0.19-1+deb12u3
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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- published3 Sept 2026
- disclosed1 Mar 2024
Introduced: 1 Mar 2024
CVE-2024-27354 (opens in a new tab)How to fix?
Upgrade Echo:latest php-phpseclib3 to version 3.0.19-1+deb12u3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream php-phpseclib3 package and not the php-phpseclib3 package as distributed by Echo.
See How to fix? for Echo:latest 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://advisory.echohq.com/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