{"id":"USN-5111-2","summary":"strongswan vulnerability","details":"USN-5111-1 fixed a vulnerability in strongSwan. This update provides\nthe corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.\n\nOriginal advisory details:\n\n It was discovered that strongSwan incorrectly handled replacing\n certificates in the cache. A remote attacker could use this issue to cause\n strongSwan to crash, resulting in a denial of service, or possibly execute\n arbitrary code. (CVE-2021-41991)\n","modified":"2026-06-29T13:49:34.597178876Z","published":"2021-10-19T15:10:02Z","related":["UBUNTU-CVE-2021-41991"],"upstream":["CVE-2021-41991","UBUNTU-CVE-2021-41991"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5111-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-41991"}],"affected":[{"package":{"name":"strongswan","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/strongswan?arch=source&distro=trusty%2Fesm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.2-0ubuntu2.11+esm1"}]}],"versions":["4.6.4-9","5.1.0-2","5.1.0-3","5.1.1-0ubuntu1","5.1.1-0ubuntu2","5.1.1-0ubuntu3","5.1.1-0ubuntu4","5.1.1-0ubuntu5","5.1.1-0ubuntu7","5.1.1-0ubuntu14","5.1.1-0ubuntu17","5.1.2~dr3+git20130120-0ubuntu2","5.1.2~dr3+git20130120-0ubuntu3","5.1.2~rc1-0ubuntu3","5.1.2~rc1-0ubuntu4","5.1.2~rc2-0ubuntu2","5.1.2-0ubuntu1","5.1.2-0ubuntu2","5.1.2-0ubuntu2.2","5.1.2-0ubuntu2.3","5.1.2-0ubuntu2.4","5.1.2-0ubuntu2.5","5.1.2-0ubuntu2.6","5.1.2-0ubuntu2.7","5.1.2-0ubuntu2.8","5.1.2-0ubuntu2.10","5.1.2-0ubuntu2.11"],"ecosystem_specific":{"binaries":[{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"libstrongswan"},{"binary_name":"strongswan","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-ike"},{"binary_name":"strongswan-ikev1","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-ikev2"},{"binary_name":"strongswan-nm","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-af-alg","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-agent","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-attr-sql"},{"binary_name":"strongswan-plugin-certexpire","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-coupling","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-curl","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-dhcp"},{"binary_name":"strongswan-plugin-dnscert","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-dnskey","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-duplicheck","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-eap-aka"},{"binary_name":"strongswan-plugin-eap-aka-3gpp2","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-eap-dynamic"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-eap-gtc"},{"binary_name":"strongswan-plugin-eap-md5","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-eap-mschapv2","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-eap-peap","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-eap-radius","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-eap-sim"},{"binary_name":"strongswan-plugin-eap-sim-file","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-eap-sim-pcsc"},{"binary_name":"strongswan-plugin-eap-simaka-pseudonym","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-eap-simaka-reauth"},{"binary_name":"strongswan-plugin-eap-simaka-sql","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-eap-tls","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-eap-tnc","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-eap-ttls","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-error-notify"},{"binary_name":"strongswan-plugin-farp","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-fips-prf","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-gcrypt","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-gmp"},{"binary_name":"strongswan-plugin-ipseckey","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-kernel-libipsec","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-ldap","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-led","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_name":"strongswan-plugin-load-tester","binary_version":"5.1.2-0ubuntu2.11+esm1"},{"binary_version":"5.1.2-0ubuntu2.11+esm1","binary_name":"strongswan-plugin-lookip"},{"binary_name":"strongswan-plugin-mysql","binary_version":"5.1.2-0ubuntu2.11+esm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