{"id":"UBUNTU-CVE-2015-1789","details":"The X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1_TIME data, as demonstrated by an attack against a server that supports client authentication with a custom verification callback.","modified":"2026-04-22T10:09:50.942425Z","published":"2015-06-11T00:00:00Z","related":["USN-2639-1"],"upstream":["CVE-2015-1789"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-1789"},{"type":"REPORT","url":"https://www.openssl.org/news/secadv_20150611.txt"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2639-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-1789"}],"affected":[{"package":{"name":"openssl","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.1f-1ubuntu2.15?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1f-1ubuntu2.15"}]}],"versions":["1.0.1e-3ubuntu1","1.0.1e-4ubuntu1","1.0.1e-4ubuntu2","1.0.1e-4ubuntu3","1.0.1e-4ubuntu4","1.0.1f-1ubuntu1","1.0.1f-1ubuntu2","1.0.1f-1ubuntu2.1","1.0.1f-1ubuntu2.2","1.0.1f-1ubuntu2.3","1.0.1f-1ubuntu2.4","1.0.1f-1ubuntu2.5","1.0.1f-1ubuntu2.7","1.0.1f-1ubuntu2.8","1.0.1f-1ubuntu2.11","1.0.1f-1ubuntu2.12"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libssl1.0.0","binary_version":"1.0.1f-1ubuntu2.15"},{"binary_name":"openssl","binary_version":"1.0.1f-1ubuntu2.15"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-1789.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}