CVE-2024-27354

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.

• CWE-400

• https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0bThird Party Advisory
• https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49Product
• https://lists.debian.org/debian-lts-announce/2024/03/msg00002.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2024/03/msg00003.htmlMailing List, Third Party Advisory
• https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0bThird Party Advisory
• https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49Product
• https://lists.debian.org/debian-lts-announce/2024/03/msg00002.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2024/03/msg00003.htmlMailing List, Third Party Advisory

Published

Mar 1, 2024

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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