Buffer overflow in ffmpeg (Alpine package)

1) Buffer overflow

EUVDB-ID: #VU32875

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-2019-15942

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

FFmpeg through 4.2 has a "Conditional jump or move depends on uninitialised value" issue in h2645_parse because alloc_rbsp_buffer in libavcodec/h2645_parse.c mishandles rbsp_buffer.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ffmpeg (Alpine package): 4.2.3-r0 - 4.2.4-r0

CPE2.3

• cpe:2.3:a:alpine:ffmpeg_alpine_package:4.2.3-r0:*:*:*:*:alpine_linux:*:3.11
• cpe:2.3:a:alpine:ffmpeg_alpine_package:4.2.3-r1:*:*:*:*:alpine_linux:*:3.12
• cpe:2.3:a:alpine:ffmpeg_alpine_package:4.2.4-r0:*:*:*:*:alpine_linux:*:3.11

External links

https://git.alpinelinux.org/aports/commit/?id=a06541424702380d7a111b112c981b1e09910bae
https://git.alpinelinux.org/aports/commit/?id=2a2f5de5a32743832ff7162605d6dfafe6fbd022
https://git.alpinelinux.org/aports/commit/?id=c0e9c2726f23f0410b383f030c4e2c8ab6b5090f

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.