Heap-based buffer overflow in ffmpeg (Alpine package)

1) Heap-based buffer overflow

EUVDB-ID: #VU32873

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-14212

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 within the avio_get_str in libavformat/aviobuf.c because dnn_backend_native.c calls ff_dnn_load_model_native and a certain index check is omitted. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger 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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ffmpeg (Alpine package): 4.3-r0 - 4.3-r3

CPE2.3

• cpe:2.3:o:alpine:ffmpeg_alpine_package:4.3-r0:*:*:*:*:alpine_linux:*:3.11
• cpe:2.3:o:alpine:ffmpeg_alpine_package:4.3-r3:*:*:*:*:alpine_linux:*:3.12

External links

https://git.alpinelinux.org/aports/commit/?id=7a5e481ae27a0e4dc839f7f494d3306259bc3e7c
https://git.alpinelinux.org/aports/commit/?id=c1ca90f3b7643eebc12d2c6604408afbe6056e2f

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.