#VU58233 Division by zero in OpenEXR - CVE-2021-3941

Vulnerability identifier: #VU58233

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3941

CWE-ID: CWE-369

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenEXR
Client/Desktop applications / Multimedia software

Vendor: OpenEXR

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to divide-by-zero issue in Imf_3_1::RGBtoXYZ. A remote attacker can trick the victim to open a specially crafted file, trigger division by zero and crash the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenEXR: 2.0.0 - 3.1.1

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External links
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39084
https://bugzilla.redhat.com/show_bug.cgi?id=2019789
https://github.com/AcademySoftwareFoundation/openexr/pull/1153

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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.