Ubuntu Security Notice USN-726-1 – It was discovered that curl did not enforce any restrictions when following URL redirects. If a user or automated system were tricked into opening a URL to an untrusted server, an attacker could use redirects to gain access to arbitrary files. This update changes curl behavior to prevent following “file” URLs after a redirect.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75406/USN-726-1.txt
Source: https://packetstormsecurity.com/files/75406/Ubuntu-Security-Notice-726-1.html