Assertion failure in ffmpeg (Alpine package)

1) Assertion failure

EUVDB-ID: #VU14532

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-15822

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The vulnerability exists due to insufficient checks for an empty audio packet by the flv_write_packet function, as defined in the libavformat/flvenc.c source code file. A local attacker can access the system and execute a specially crafted application that submits malicious input to trigger an assertion failure and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ffmpeg (Alpine package): 2.1.4-r0 - 4.0.2-r0

ffmpeg (Alpine package):

External links

http://git.alpinelinux.org/aports/commit/?id=8b2616ec00d3b29a5bdc2fce68c0594898b57b63
http://git.alpinelinux.org/aports/commit/?id=adac785d84798e462af5871aa7df312c6510c248
http://git.alpinelinux.org/aports/commit/?id=d8d38dabc6e30c901eb6bd6627d8337849d7c041
http://git.alpinelinux.org/aports/commit/?id=cf78a820406ae4481e937bc2fba252ff79c89a09
http://git.alpinelinux.org/aports/commit/?id=859fd99d06049c009c8b745626511cd681061a99

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.