Resource exhaustion in OpenEXR - CVE-2021-3478

Vulnerability identifier: #VU51933

CSH Severity: Medium

CVSS v4: 6.7 [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]

CVE-ID: CVE-2021-3478

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

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 in the scanline input file functionality. A remote attacker can use a specially crafted file, trigger resource exhaustion and perform a denial of service (DoS) attack.

OpenEXR
Gentoo Linux
Ubuntu
cflinuxfs3
openexr (Ubuntu package)
libopenexr22 (Ubuntu package)
libopenexr24 (Ubuntu package)
libopenexr25 (Ubuntu package)

Install updates from vendor's website.

OpenEXR - addressed in versions 2.4.3, 3.0.0 beta
cflinuxfs3 - update to 0.234.0
openexr (Ubuntu package) - addressed in versions 2.2.0-10ubuntu2.6, 2.2.0-11.1ubuntu1.6, 2.3.0-6ubuntu0.5, 2.5.3-2ubuntu0.2
libopenexr22 (Ubuntu package) - addressed in versions 2.2.0-10ubuntu2.6, 2.2.0-11.1ubuntu1.6
libopenexr24 (Ubuntu package) - update to 2.3.0-6ubuntu0.5
libopenexr25 (Ubuntu package) - update to 2.5.3-2ubuntu0.2

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27409
• https://bugzilla.redhat.com/show_bug.cgi?id=1939160
• https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v2.4.3

• Multiple vulnerabilities in OpenEXR
• Multiple vulnerabilities in Cloud Foundry cflinuxfs3
• Gentoo update for OpenEXR
• Ubuntu update for openexr