#VU38636 Input validation error in Libav - CVE-2017-11684

Vulnerability identifier: #VU38636

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-11684

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Libav
Client/Desktop applications / Multimedia software

Vendor: Libav

Description

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

There is an illegal address access in the build_table function in libavcodec/bitstream.c of Libav 12.1 that will lead to remote denial of service via crafted input.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Libav: 12.1

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External links
https://www.securityfocus.com/bid/99980
https://bugzilla.libav.org/show_bug.cgi?id=1073

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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