A denial-of-service vulnerability in the in-memory certificate cache was discovered in strongSwan. All versions since 4.2.10 are affected.

A potential authorization bypass vulnerability in the gmp plugin was discovered in strongSwan. All versions are affected in certain configurations.

A denial-of-service vulnerability in the IKEv2 key derivation if the openssl plugin is used in FIPS mode and HMAC-MD5 is negotiated as PRF was discovered, all strongSwan versions since 5.0.1 may be affected.

A denial-of-service vulnerability in the stroke plugin was discovered in strongSwan. All versions are affected in certain configurations.

A denial-of-service vulnerability in the gmp plugin was discovered in strongSwan. All versions are affected.

A denial-of-service vulnerability in the gmp plugin was discovered in strongSwan. All versions since 4.4.0 are affected.

A denial-of-service vulnerability in the x509 plugin was discovered in strongSwan. All versions are affected.

We are happy to announce the release of strongSwan 5.5.3 which avoids traffic loss during IKEv2 CHILD_SA rekeying, runs on the ARM64 iOS platform, and fixes two vulnerabilities and several other issues.

We are happy to announce the release of strongSwan 5.5.2 which brings support for DH group 31 using Curve25519 and the Ed25519 signature algorithm for IKEv2, storing private keys on a TPM 2.0, automatic installation of bypass policies for LANs, several new features for the VICI interface and swanctl and lots of other new features and fixes.

We are happy to announce the release of strongSwan 5.5.1 which brings support for the NewHope post-quantum key exchange algorithm, simplified private key handling in swanctl and pki, configurable XFRM policy hashing thresholds, improved delta CRL handling, support for NetworkManager 1.2 and several other new features and fixes.