PT-2023-21205 · Phpseclib · Phpseclib

Published 2023-03-03 · Updated 2025-09-15 · CVE-2023-27560

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions phpseclib versions 3.0.0 through 3.0.18

Description The issue is related to an infinite loop with composite primefields in the Math/PrimeField.php file. This was introduced in version 3.0.0 and has been patched in version 3.0.19.

Recommendations For phpseclib versions 3.0.0 through 3.0.18, update to version 3.0.19 to resolve the issue. As a temporary workaround, consider avoiding the use of composite primefields in the Math/PrimeField.php file until the update is applied.

Exploit

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2023-27560

DLA-3749-1

DLA-3750-1

GHSA-HM7P-R324-HHF3

Affected Products

Phpseclib

References · 19

• 🔥 https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2023-27560.yaml · Exploit
• https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440 · Patch
• https://ubuntu.com/security/CVE-2023-27560 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-27560 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-27560 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-27560 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-27560 · Security Note
• https://osv.dev/vulnerability/DLA-3750-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-27560 · Security Note
• https://osv.dev/vulnerability/DLA-3749-1 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-hm7p-r324-hhf3 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-27560 · Vendor Advisory
• https://github.com/phpseclib/phpseclib · Note
• https://github.com/phpseclib/phpseclib/releases/tag/3.0.19 · Note
• https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440#commitcomment-103226722 · Note