Description
The rsa_pss_params_parse function in libstrongswan/credentials/keys/signature_params.c in strongSwan 5.6.1 allows remote attackers to cause a denial of service via a crafted RSASSA-PSS signature that lacks a mask generation function parameter.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | strongswan | 5.6.2-1 | — |
| Debian 13 | strongswan | 5.6.2-1 | — |
| Debian 12 | strongswan | 5.6.2-1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | strongswan | 5.8.2-4.6.14 | SUSE-SU-2020:0743-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | strongswan | 5.9.0-1.9 | openSUSE-SU-2024:11411-1 |
| openSUSE Leap 15.1 | strongswan | 5.8.2-lp151.4.6.1 | openSUSE-SU-2020:0403-1 |
Advisories 3
- openSUSE-SU-2020:0403-1 Security update for strongswan SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11411-1 strongswan-5.9.0-1.9 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0743-1 Security update for strongswan SUSE / openSUSE Security Updates · Feb 4, 2026
References
- GLSA-201811-16 vendor-advisory
- https://www.strongswan.org/blog/2018/02/19/strongswan-vulnerability-%28cve-2018-6459%29.html
- openSUSE-SU-2020:0403 vendor-advisory