#VU51934 Resource exhaustion in OpenEXR - CVE-2021-3479

Vulnerability identifier: #VU51934

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3479

CWE-ID: CWE-400

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 application does not properly control consumption of internal resources within the Scanline API functionality. A remote attacker can use a specially crafted file, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenEXR: 1.0.4 - 2.5.5

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External links
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25370
https://bugzilla.redhat.com/show_bug.cgi?id=1939149
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v2.4.3

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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.