What is CVE-2021-20304?

CVE-2021-20304 is a high-severity vulnerability in Openexr, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2022-08-23.

How severe is CVE-2021-20304?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2021-20304 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Integer overflow in Openexr

CVE-2021-20304

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.

Vulnerability class: Integer Overflow

EPSS: 0.015 (71.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Openexr
N/a Openexr — versions Fixed in OpenEXR 3.0.0-beta

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

secalert@redhat.com (Exploit, Mailing List, Third Party Advisory)
secalert@redhat.com (Patch, Third Party Advisory)
secalert@redhat.com (Patch, Third Party Advisory)
secalert@redhat.com (Third Party Advisory, Issue Tracking)
secalert@redhat.com (Third Party Advisory)
secalert@redhat.com (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2021-20304?: CVE-2021-20304 is a high-severity vulnerability in Openexr, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2022-08-23.
How severe is CVE-2021-20304?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-20304 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.