FFmpeg/aubio libswresample audioconvert.c swri_audio_convert null pointer dereference

Summaryinfo

A vulnerability has been found in FFmpeg and aubio and classified as problematic. This affects the function swri_audio_convert of the file audioconvert.c of the component libswresample. The manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2017-17555. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in FFmpeg and aubio (Multimedia Processing Software) (the affected version unknown). It has been rated as problematic. This issue affects the function swri_audio_convert of the file audioconvert.c of the component libswresample. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

The swri_audio_convert function in audioconvert.c in FFmpeg libswresample through 3.0.101, as used in FFmpeg 3.4.1, aubio 0.4.6, and other products, allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted audio file.

The bug was discovered 11/05/2017. The weakness was shared 12/12/2017 (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2017-17555 since 12/11/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 36 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106890 (openSUSE Security Update : ffmpeg (openSUSE-2018-172)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170874 (OpenSUSE Security Update for ffmpeg (openSUSE-SU-2018:0476-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106890). The entries VDB-108603, VDB-110112, VDB-112644 and VDB-112831 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Multimedia Processing Software

Name

• aubio
• FFmpeg

License

• open-source

Website

• Product: https://ffmpeg.org/

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Be aware that VulDB is the high quality source for vulnerability data.

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