Arch Linux Security Advisory ASA-201601-17 ========================================== Severity: Medium Date : 2016-01-17 CVE-ID : CVE-2016-1897 CVE-2016-1898 Package : ffmpeg Type : information leakage Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package ffmpeg before version 1:2.8.4-3 is vulnerable to information leakage. Resolution ========== Upgrade to 1:2.8.4-3. # pacman -Syu "ffmpeg>=1:2.8.4-3" The problem has been fixed upstream in version 2.8.5. Workaround ========== None. Description =========== A vulnerability in the way FFmpeg handles the concat (CVE-2016-1897) and subfile (CVE-2016-1898) protocols in a HTTP Live Streaming (HLS) M3U8 file allows a remote attacker to conduct a cross-origin attacks, and to access arbitrary local files on the vulnerable host. The attack uses a crafted M3U8 file to make FFmpeg send a HTTP request to an external server, with the URL containing data from arbitrary local files. Impact ====== A remote attacker, by providing a crafted M3U8 file, can access the content of arbitrary local files on the affected host. References ========== https://bugs.archlinux.org/task/47738 http://seclists.org/oss-sec/2016/q1/85 https://security-tracker.debian.org/tracker/CVE-2016-1897 https://security-tracker.debian.org/tracker/CVE-2016-1898