CVE-2024-27354

Description

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.

How to fix CVE-2024-27354

To remediate CVE-2024-27354, upgrade the affected package to a fixed version below.

• —upgrade to 2.0.30-2~deb10u3 or later
• —upgrade to 2.0.30-2+deb11u2 or later
• —upgrade to 3.0.19-1+deb12u3 or later
• —upgrade to 1.0.19-3~deb10u3 or later
• —upgrade to 1.0.19-3+deb11u2 or later
• —upgrade to 1.0.23 or later
• —upgrade to 1.0.23 or later

Is CVE-2024-27354 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (7)

• from 0, < 2.0.30-2~deb10u3
• from 0, < 2.0.30-2+deb11u2
• from 0, < 3.0.19-1+deb12u3
• from 0, < 1.0.19-3~deb10u3
• from 0, < 1.0.19-3+deb11u2
• >= 0.1.1, < 1.0.23
• >= 1.0.0, < 1.0.23

CVSS scores

References (13)

• ADVISORYgithub.com/advisories/GHSA-hg35-mp25-qf6h
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2024-27354
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2024-27354
• PATCHgithub.com/phpseclib/phpseclib
• WEB