FFmpeg up to 4.0.1 MOV Audio File libavformat/movenc.c divide by zero

Summaryinfo

A vulnerability labeled as problematic has been found in FFmpeg up to 4.0.1. The impacted element is an unknown function of the file libavformat/movenc.c of the component MOV Audio File Handler. Such manipulation leads to divide by zero. This vulnerability is traded as CVE-2018-14395. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in FFmpeg up to 4.0.1 (Multimedia Processing Software) and classified as problematic. Affected by this issue is an unknown part of the file libavformat/movenc.c of the component MOV Audio File Handler. The manipulation with an unknown input leads to a divide by zero vulnerability. Using CWE to declare the problem leads to CWE-369. The product divides a value by zero. Impacted is availability. CVE summarizes:

libavformat/movenc.c in FFmpeg before 4.0.2 allows attackers to cause a denial of service (application crash caused by a divide-by-zero error) with a user crafted audio file when converting to the MOV audio format.

The bug was discovered 07/07/2018. The weakness was shared 07/19/2018 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-14395 since 07/18/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability was handled as a non-public zero-day exploit for at least 12 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111396 (Debian DSA-4258-1 : ffmpeg - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176441 (Debian Security Update for ffmpeg (DSA 4258-1)).

Upgrading to version 4.0.2 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (111396). The entry VDB-121963 is related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Multimedia Processing Software

Name

• FFmpeg

Version

• 4.0.0
• 4.0.1

License

• open-source

Website

• Product: https://ffmpeg.org/

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Once again VulDB remains the best source for vulnerability data.

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