USN-5111-1: strongSwan vulnerabilities

Releases

• Ubuntu 21.10
• Ubuntu 21.04
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• strongswan - IPsec VPN solution

Details

It was discovered that strongSwan incorrectly handled certain RSASSA-PSS
signatures. A remote attacker could use this issue to cause strongSwan to
crash, resulting in a denial of service. (CVE-2021-41990)

It was discovered that strongSwan incorrectly handled replacing
certificates in the cache. A remote attacker could use this issue to cause
strongSwan to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2021-41991)

Update instructions

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

Ubuntu 21.10

• libstrongswan - 5.9.1-1ubuntu3.1
• strongswan - 5.9.1-1ubuntu3.1

Ubuntu 21.04

• libstrongswan - 5.9.1-1ubuntu1.2
• strongswan - 5.9.1-1ubuntu1.2

Ubuntu 20.04

• libstrongswan - 5.8.2-1ubuntu3.3
• strongswan - 5.8.2-1ubuntu3.3

Ubuntu 18.04

• libstrongswan - 5.6.2-1ubuntu2.7
• strongswan - 5.6.2-1ubuntu2.7

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

References

• CVE-2021-41991
• CVE-2021-41990

Related notices

• USN-5111-2: libstrongswan-standard-plugins, strongswan-nm, strongswan-plugin-pkcs11, strongswan-plugin-eap-aka, strongswan-plugin-eap-aka-3gpp2, strongswan-plugin-xauth-noauth, strongswan-plugin-pgp, strongswan-plugin-farp, strongswan-plugin-openssl, strongswan-plugin-ntru, strongswan-plugin-eap-ttls, strongswan-plugin-pubkey, strongswan-plugin-dhcp, strongswan-plugin-ldap, strongswan-plugin-soup, strongswan-plugin-eap-sim-file, strongswan-plugin-kernel-libipsec, strongswan-plugin-duplicheck, strongswan-plugin-sql, strongswan-libcharon, strongswan-plugin-unity, strongswan-plugin-eap-mschapv2, strongswan-tnc-client, libstrongswan, strongswan-plugin-led, strongswan-ike, strongswan-plugin-af-alg, strongswan-plugin-eap-simaka-reauth, strongswan-plugin-eap-tls, strongswan-plugin-eap-tnc, strongswan-plugin-eap-peap, strongswan-tnc-pdp, strongswan-plugin-xauth-eap, charon-cmd, strongswan-plugin-eap-simaka-pseudonym, strongswan-tnc-ifmap, strongswan-tnc-server, strongswan, strongswan-ikev2, strongswan-pt-tls-client, strongswan-plugin-radattr, strongswan-plugin-lookip, strongswan-plugin-agent, strongswan-plugin-curl, strongswan-plugin-mysql, strongswan-plugin-attr-sql, strongswan-tnc-base, strongswan-plugin-dnscert, strongswan-plugin-load-tester, libcharon-extra-plugins, strongswan-plugin-systime-fix, strongswan-plugin-xauth-pam, strongswan-plugin-fips-prf, strongswan-plugin-gcrypt, strongswan-ikev1, strongswan-plugin-coupling, strongswan-plugin-eap-sim, strongswan-plugin-eap-simaka-sql, strongswan-plugin-eap-radius, strongswan-plugin-sqlite, libstrongswan-extra-plugins, strongswan-plugin-sshkey, strongswan-plugin-whitelist, strongswan-plugin-xauth-generic, strongswan-plugin-ipseckey, strongswan-plugin-dnskey, strongswan-plugin-eap-gtc, strongswan-plugin-error-notify, strongswan-starter, strongswan-plugin-eap-sim-pcsc, strongswan-plugin-eap-md5, strongswan-plugin-unbound, strongswan-plugin-certexpire, strongswan-charon, strongswan-plugin-eap-dynamic, strongswan-plugin-gmp