Stack-based buffer overflow in FFmpeg - CVE-2017-9990

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the color_string_to_rgba function in libavcodec/xpmdec.c when processing a crafted file. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

How to mitigate CVE-2017-9990

Sources

• http://www.securityfocus.com/bid/99313
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1466
• https://github.com/FFmpeg/FFmpeg/commit/cb243972b121b1ae6b60a78ff55a0506c69f3879