Multiple vulnerabilities in FFmpeg

Published: 2016-12-23 | Updated: 2025-06-08

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2016-6881 CVE-2016-6920
CWE-ID	CWE-399 CWE-122
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	FFmpeg Universal components / Libraries / Libraries used by multiple products
Vendor	ffmpeg.sourceforge.net

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource management error

EUVDB-ID: #VU32153

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-6881

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

The zlib_refill function in libavformat/swfdec.c in FFmpeg before 3.1.3 allows remote attackers to cause an infinite loop denial of service via a crafted SWF file.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FFmpeg: 3.1.0 - 3.1.2

CPE2.3

External links

https://www.openwall.com/lists/oss-security/2016/09/26/6
https://www.securityfocus.com/bid/93163

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.

2) Heap-based buffer overflow

EUVDB-ID: #VU110564

Risk: Medium

CVSSv4.0: N/A

CVE-ID: CVE-2016-6920

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

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 decode_block function in libavcodec/exr.c in FFmpeg before 3.1.3. A remote attacker can use vectors involving tile positions. to trigger a 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.