phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.
https://github.com/phpseclib/phpseclib/releases/tag/2.0.31
https://github.com/phpseclib/phpseclib/pull/1635
https://github.com/phpseclib/phpseclib/releases/tag/3.0.7
https://lists.debian.org/debian-lts-announce/2022/11/msg00024.html
https://lists.debian.org/debian-lts-announce/2022/11/msg00025.html
Source: MITRE
Published: 2021-04-06
Updated: 2023-01-27
Type: CWE-347
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH