Out-of-bounds write in openexr (Alpine package)

1) Out-of-bounds write

EUVDB-ID: #VU20312

Risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/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-2018-18444

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the exrmultiview in makeMultiView.cpp. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

openexr (Alpine package): 2.2.1-r0

CPE2.3

• cpe:2.3:a:alpine:openexr_alpine_package:2.2.1-r0:*:*:*:*:alpine_linux:*:3.8

External links

https://git.alpinelinux.org/aports/commit/?id=b78bdd461f3bf9cc42126ddfd87fb31bc28319cd
https://git.alpinelinux.org/aports/commit/?id=c898c3b7eb2406e8bf490bf340b4027e3fe9cd4e

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.