FFmpeg 2.x allows remote attackers to conduct cross-origin attacks and read arbitrary files by using the concat protocol in an HTTP Live Streaming (HLS) M3U8 file, leading to an external HTTP request in which the URL string contains the first line of a local file.
http://habrahabr.ru/company/mailru/blog/274855
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00034.html
http://security.stackexchange.com/questions/110644
http://www.debian.org/security/2016/dsa-3506
http://www.openwall.com/lists/oss-security/2016/01/14/1
http://www.securityfocus.com/bid/80501
http://www.securitytracker.com/id/1034932
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.529036
http://www.ubuntu.com/usn/USN-2944-1
https://security.gentoo.org/glsa/201606-09
Source: MITRE
Published: 2016-01-15
Updated: 2018-10-30
Type: CWE-200
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 5.5
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Impact Score: 3.6
Exploitability Score: 1.8
Severity: MEDIUM