CVE-2021-41990

high

Description

The gmp plugin in strongSwan before 5.9.4 has a remote integer overflow via a crafted certificate with an RSASSA-PSS signature. For example, this can be triggered by an unrelated self-signed CA certificate sent by an initiator. Remote code execution cannot occur.

References

https://www.debian.org/security/2021/dsa-4989

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3TQ32JLJOBJDB2EJKSX2PBPB5NFG2D4/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQSQ3BEC22NF4NCDZVCT4P3Q2ZIAJXGJ/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FJSATD2R2XHTG4P63GCMQ2N7EWKMME5/

https://github.com/strongswan/strongswan/releases/tag/5.9.4

https://cert-portal.siemens.com/productcert/pdf/ssa-539476.pdf

https://www.cisa.gov/news-events/ics-advisories/icsa-25-259-03

https://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-%28cve-2021-41990%29.html

https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-28980

Details

Source: Mitre, NVD

Published: 2021-10-18

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.06702