Denial of service in OpenEXR

Published: 2021-11-18 | Updated: 2022-12-19

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-3941 CVE-2021-3933
CWE-ID	CWE-369 CWE-190
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	OpenEXR Client/Desktop applications / Multimedia software
Vendor	OpenEXR

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Division by zero

EUVDB-ID: #VU58233

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3941

CWE-ID: CWE-369 - Divide By Zero

Exploit availability: No

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

External links

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

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.

2) Integer overflow

EUVDB-ID: #VU70427

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3933

CWE-ID: CWE-190 - Integer overflow