Description
strongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named "public" for two different purposes within the same function. There is initially incorrect access control, later followed by an expired pointer dereference. One attack vector is sending an untrusted client certificate during EAP-TLS. A server is affected only if it loads plugins that implement TLS-based EAP methods (EAP-TLS, EAP-TTLS, EAP-PEAP, or EAP-TNC). This is fixed in 5.9.10.
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 | 5.9.8-4 | — |
| Debian 13 | strongswan | 5.9.8-4 | — |
| Debian 12 | strongswan | 5.9.8-4 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | strongswan | 5.9.10-1.1 | openSUSE-SU-2024:12749-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | strongswan | 5.9.10-r0 | — |
| Alpine v3.23 | strongswan | 5.9.10-r0 | — |
| Alpine v3.22 | strongswan | 5.9.10-r0 | — |
| Alpine v3.21 | strongswan | 5.9.10-r0 | — |
| Alpine v3.20 | strongswan | 5.9.10-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | strongswan | 5.9.10-r0 | — |
| Alpine v3.18 | strongswan | 5.9.10-r0 | — |
| Alpine v3.17 | strongswan | 5.9.10-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | strongswan | 5.9.10-1 | — |
Advisories 2
- openSUSE-SU-2024:12749-1 strongswan-5.9.10-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0569 strongSwan: Schwachstelle ermöglicht Codeausführung und DoS BSI CERT-Bund (WID) · Aug 11, 2024