CVE-2021-20296 : A flaw was found in OpenEXR in versions before 3.0.0-beta. A crafted input file supplied by an attacker, that is process

A flaw was found in OpenEXR in versions before 3.0.0-beta. A crafted input file supplied by an attacker, that is processed by the Dwa decompression functionality of OpenEXR's IlmImf library, could cause a NULL pointer dereference. The highest threat from this vulnerability is to system availability.

Published 2021-04-01 14:15:13

Updated 2022-12-13 01:56:41

Source Red Hat, Inc.

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2021-20296

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Matching versions
Openexr » Openexr
Versions before (<) 2.4.3
cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*
Matching versions
Openexr » Openexr
Versions from including (>=) 2.5.0 and before (<) 2.5.4
cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-20296

EPSS FAQ

0.13%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 48 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20296

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: Low

CWE ids for CVE-2021-20296

CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

Assigned by: secalert@redhat.com (Primary)

References for CVE-2021-20296

https://security.gentoo.org/glsa/202107-27

OpenEXR: Multiple vulnerabilities (GLSA 202107-27) — Gentoo security
Third Party Advisory

CVEs referencing this url
https://bugzilla.redhat.com/show_bug.cgi?id=1939141

1939141 – (CVE-2021-20296) CVE-2021-20296 OpenEXR: Segv on unknown address in Imf_2_5::hufUncompress - Null Pointer dereference
Issue Tracking;Patch;Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24854

24854 - openexr:openexr_exrenvmap_fuzzer: Segv on unknown address in Imf_2_5::hufUncompress - oss-fuzz
Issue Tracking;Mailing List;Patch;Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00001.html

[SECURITY] [DLA 2701-1] openexr security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2022/12/msg00022.html

[SECURITY] [DLA 3236-1] openexr security update
Mailing List;Third Party Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2021-20296

Products affected by CVE-2021-20296

Exploit prediction scoring system (EPSS) score for CVE-2021-20296

CVSS scores for CVE-2021-20296

CWE ids for CVE-2021-20296

References for CVE-2021-20296