Vulnerability identifier: #VU32058

Vulnerability risk: Medium

CVSSv3.1: 6.8 [AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-9991

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
FFmpeg
Universal components / Libraries / Libraries used by multiple products

Vendor: ffmpeg.sourceforge.net

Description

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

The vulnerability exists due to a boundary error in Heap-based buffer overflow in the xwd_decode_frame function in libavcodec/xwddec.c in FFmpeg before 2.8.12, 3.0.x before 3.0.8, 3.1.x before 3.1.8, 3.2.x before 3.2.5, and 3.3.x before 3.3.1. A remote attacker can use a crafted file. to trigger heap-based buffer overflow and execute arbitrary code on the target system.

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

Mitigation
The vendor has issued the following versions to address this vulnerability: 2.8.12, 3.0.8, 3.1.8, 3.2.5, 3.3.1.

Vulnerable software versions

FFmpeg: 2.8.0 - 3.3.0

---

External links
http://www.securityfocus.com/bid/99316
http://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1399
http://github.com/FFmpeg/FFmpeg/commit/441026fcb13ac23aa10edc312bdacb6445a0ad06

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.