Integer overflow in firefox (Alpine package)

1) Integer overflow

EUVDB-ID: #VU29461

Risk: High

CVSSv3.1: 7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12422

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow within the nsJPEGEncoder::emptyOutputBuffer function when processing JPEG images. A remote attacker can create a specially crafted JPEG image, trick the victim into visiting a web page with such an image, trigger integer 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

firefox (Alpine package): 70.0-r0 - 77.0.1-r4

External links

http://git.alpinelinux.org/aports/commit/?id=02f4c40162bc3c2f611ce86613bbf01f13e6146b
http://git.alpinelinux.org/aports/commit/?id=7ece421265010e81e06c3b8b9137b0b62f7acc73

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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