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USN-5651-1: strongSwan vulnerability

3 October 2022

strongSwan could be made do denial of service if it received a specially crafted certificate.

Releases

Packages

Details

Lahav Schlesinger discovered that strongSwan incorrectly handled certain OCSP URIs and
and CRL distribution points (CDP) in certificates. A remote attacker could
possibly use this issue to initiate IKE_SAs and send crafted certificates
that contain URIs pointing to servers under their control, which can lead
to a denial-of-service attack.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04

In general, a standard system update will make all the necessary changes.

References

Related notices

  • USN-5651-2: strongswan-plugin-openssl, strongswan-plugin-eap-mschapv2, libcharon-extra-plugins, strongswan-plugin-dhcp, strongswan-plugin-coupling, strongswan-plugin-curl, strongswan-plugin-eap-simaka-pseudonym, strongswan-plugin-error-notify, strongswan-plugin-fips-prf, strongswan-plugin-xauth-noauth, strongswan-plugin-agent, strongswan-plugin-mysql, strongswan-plugin-pgp, strongswan-plugin-ipseckey, strongswan-tnc-client, strongswan-tnc-ifmap, strongswan-plugin-af-alg, strongswan-plugin-certexpire, strongswan-plugin-eap-aka-3gpp2, strongswan-plugin-whitelist, strongswan-plugin-eap-dynamic, libstrongswan-extra-plugins, strongswan-plugin-kernel-libipsec, strongswan-plugin-soup, strongswan-plugin-sql, strongswan-tnc-base, strongswan-plugin-eap-tls, strongswan-plugin-pubkey, strongswan-plugin-eap-sim-pcsc, strongswan-plugin-gmp, strongswan-ikev1, strongswan-plugin-radattr, strongswan-plugin-eap-md5, strongswan-plugin-eap-aka, strongswan-plugin-eap-tnc, strongswan-plugin-eap-simaka-reauth, strongswan-plugin-ntru, libstrongswan-standard-plugins, strongswan-tnc-server, strongswan-starter, strongswan-plugin-eap-radius, strongswan-plugin-unbound, strongswan-pt-tls-client, strongswan-plugin-lookip, strongswan-plugin-eap-simaka-sql, strongswan-tnc-pdp, strongswan-plugin-eap-gtc, strongswan-plugin-xauth-eap, strongswan-plugin-pkcs11, strongswan-plugin-farp, strongswan-plugin-xauth-pam, strongswan-plugin-load-tester, strongswan-plugin-unity, strongswan-plugin-xauth-generic, strongswan-charon, strongswan-plugin-duplicheck, strongswan-plugin-dnscert, strongswan-plugin-sshkey, strongswan-plugin-eap-ttls, strongswan-plugin-ldap, strongswan-ike, strongswan-plugin-dnskey, strongswan, strongswan-nm, libstrongswan, strongswan-plugin-eap-sim-file, strongswan-plugin-led, strongswan-ikev2, strongswan-libcharon, strongswan-plugin-gcrypt, strongswan-plugin-sqlite, strongswan-plugin-eap-sim, strongswan-plugin-attr-sql, strongswan-plugin-systime-fix, strongswan-plugin-eap-peap, charon-cmd