Description
IKEv2 in strongSwan 4.0.7 before 5.1.3 allows remote attackers to bypass authentication by rekeying an IKE_SA during (1) initiation or (2) re-authentication, which triggers the IKE_SA state to be set to established.
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 | 5.1.2-4 | — |
| Debian 13 | strongswan | 5.1.2-4 | — |
| Debian 12 | strongswan | 5.1.2-4 | — |
| Debian 7 | strongswan | 4.5.2-1.5+deb7u3 | DSA-2903-1 |
| Debian 6.0 | strongswan | 4.4.1-5.5 | DSA-2903-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | strongswan | 5.1.2-0ubuntu2 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | strongswan | 5.3.5-1.1 | openSUSE-SU-2024:10579-1 |
Advisories 2
- DSA-2903-1 strongswan - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10579-1 strongswan-5.3.5-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- openSUSE-SU-2014:0697 vendor-advisory
- SUSE-SU-2014:0529 vendor-advisory
- openSUSE-SU-2014:0700 vendor-advisory
- DSA-2903 vendor-advisory
- 57823 third-party-advisory
- 66815 vdb-entry
- http://www.strongswan.org/blog/2014/04/14/strongswan-authentication-bypass-vulnerability-%28cve-2014-2338%29.html