Out-of-bounds read in ffmpeg (Alpine package)



Published: 2019-08-16
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-13305
CWE-ID CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		ffmpeg (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Out-of-bounds read

EUVDB-ID: #VU32005

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-13305

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to #BASIC_IMPACT#.

In FFmpeg 4.0.1, due to a missing check for negative values of the mquant variable, the vc1_put_blocks_clamped function in libavcodec/vc1_block.c may trigger an out-of-array access while converting a crafted AVI file to MPEG4, leading to an information disclosure or a denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ffmpeg (Alpine package): 4.1.3-r1

CPE2.3 External links

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?

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.



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