strongSwan before 5.9.8 allows remote attackers to cause a denial of service in the revocation plugin by sending a crafted end-entity (and intermediate CA) certificate that contains a CRL/OCSP URL that points to a server (under the attacker's control) that doesn't properly respond but (for example) just does nothing after the initial TCP handshake, or sends an excessive amount of application data.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade strongswan | Mar 26, 2024 | Oct 31, 2022 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Oct 31, 2022 |
| Debian | — | Upgrade strongswan | Oct 12, 2022 | Oct 12, 2022 |
| Freebsd | — | Upgrade strongswan | Nov 4, 2022 | Oct 10, 2022 |
| Gentoo Linux | — | Upgrade net-vpn/strongswan. | May 6, 2024 | Oct 31, 2022 |
| Suse | — | Upgrade strongswanUpgrade strongswan-docUpgrade strongswan-nmUpgrade strongswan-mysqlUpgrade strongswan-hmacUpgrade strongswan-ipsecUpgrade strongswan-libs0Upgrade strongswan-sqlite | Nov 23, 2022 | Oct 31, 2022 |
| Ubuntu | — | Upgrade libstrongswan (Ubuntu Pro)Upgrade libstrongswanUpgrade strongswanUpgrade strongswan (Ubuntu Pro) | Oct 4, 2022 | Oct 3, 2022 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Oct 31, 2022 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub