{"id":"UBUNTU-CVE-2016-4008","details":"The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.8, when used without the ASN1_DECODE_FLAG_STRICT_DER flag, allows remote attackers to cause a denial of service (infinite recursion) via a crafted certificate.","modified":"2026-04-22T10:42:54.822140Z","published":"2016-04-14T00:00:00Z","related":["USN-2957-1","USN-2957-2"],"upstream":["CVE-2016-4008"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-4008"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2016/04/11/3"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2957-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2957-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-4008"}],"affected":[{"package":{"name":"libtasn1-6","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libtasn1-6@3.4-3ubuntu0.4?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4-3ubuntu0.4"}]}],"versions":["3.3-2","3.4-2","3.4-3","3.4-3ubuntu0.1","3.4-3ubuntu0.2","3.4-3ubuntu0.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"3.4-3ubuntu0.4","binary_name":"libtasn1-3-bin"},{"binary_name":"libtasn1-6","binary_version":"3.4-3ubuntu0.4"},{"binary_name":"libtasn1-bin","binary_version":"3.4-3ubuntu0.4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-4008.json"}},{"package":{"name":"libtasn1-6","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libtasn1-6@4.7-3ubuntu0.16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.7-3ubuntu0.16.04.1"}]}],"versions":["4.5-2","4.7-2","4.7-3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libtasn1-3-bin","binary_version":"4.7-3ubuntu0.16.04.1"},{"binary_name":"libtasn1-6","binary_version":"4.7-3ubuntu0.16.04.1"},{"binary_name":"libtasn1-bin","binary_version":"4.7-3ubuntu0.16.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-4008.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}