CVE-2024-27354
HIGH7.5EPSS 0.20%Duplicate Advisory: phpseclib: guardrails needed on isPrime and randomPrime
Published: 5/6/2026Modified: 5/6/2026
Description
### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-2528-jw5q-ww88. This link is maintained to preserve external references. ### Original 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.
Affected packages (7)
- Debian/php-phpseclibfrom 0, < 2.0.30-2~deb10u3
- Debian/php-phpseclibfrom 0, < 2.0.30-2+deb11u2
- Debian/php-phpseclib3from 0, < 3.0.19-1+deb12u3
- Debian/phpseclibfrom 0, < 1.0.19-3~deb10u3
- Debian/phpseclibfrom 0, < 1.0.19-3+deb11u2
- Packagist/phpseclib/phpseclib>= 0.1.1, < 1.0.23
- Packagist/phpseclib/phpseclib>= 1.0.0, < 1.0.23
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (13)
- ADVISORYhttps://github.com/advisories/GHSA-hg35-mp25-qf6h
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2024-27354
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2024-27354
- PATCHhttps://github.com/phpseclib/phpseclib
- WEBhttps://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b
- WEBhttps://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2024-27354.yaml
- WEBhttps://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49
- WEBhttps://github.com/phpseclib/phpseclib/commit/2870c8fab3f132d2ed40a66c97a36fe5ab625698
- WEBhttps://github.com/phpseclib/phpseclib/commit/ad5dbdf2129f5e0fb644637770b7f33de8ca8575
- WEBhttps://github.com/phpseclib/phpseclib/commit/c55b75199ec8d12cec6eadf6da99da4a3712fe56
- WEBhttps://github.com/phpseclib/phpseclib/security/advisories/GHSA-2528-jw5q-ww88
- WEBhttps://lists.debian.org/debian-lts-announce/2024/03/msg00002.html
- WEBhttps://lists.debian.org/debian-lts-announce/2024/03/msg00003.html