Ubuntu Security Notice USN-750-1 – It was discovered that OpenSSL did not properly validate the length of an encoded BMPString or UniversalString when printing ASN.1 strings. If a user or automated system were tricked into processing a crafted certificate, an attacker could cause a denial of service via application crash in applications linked against OpenSSL.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/76202/USN-750-1.txt
Source: https://packetstormsecurity.com/files/76202/Ubuntu-Security-Notice-750-1.html