VulnerabilityModified

CVE-2021-20304

This flaw allows an attacker who can pass a crafted file to be processed by OpenEXR, to trigger an undefined right shift error.

HIGH 7.5EPSS 1.94%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.94%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A flaw was found in OpenEXR's hufDecode functionality. This flaw allows an attacker who can pass a crafted file to be processed by OpenEXR, to trigger an undefined right shift error. The highest threat from this vulnerability is to system availability.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 1.94% probability · 79th percentile
CISA KEV: Not listed
Weakness: CWE-190
Affected: openexr/openexr
Source: secalert@redhat.com

References

https://access.redhat.com/security/cve/CVE-2021-20304Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26229Exploit, Mailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1939157Issue Tracking, Third Party Advisory
https://github.com/AcademySoftwareFoundation/openexr/commit/51a92d67f53c08230734e74564c807043cbfe41ePatch, Third Party Advisory
https://github.com/AcademySoftwareFoundation/openexr/pull/849Patch, Third Party Advisory
https://security.gentoo.org/glsa/202210-31Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-20304Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26229Exploit, Mailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1939157Issue Tracking, Third Party Advisory
https://github.com/AcademySoftwareFoundation/openexr/commit/51a92d67f53c08230734e74564c807043cbfe41ePatch, Third Party Advisory
https://github.com/AcademySoftwareFoundation/openexr/pull/849Patch, Third Party Advisory
https://security.gentoo.org/glsa/202210-31Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.