CVE-2021-3762

Name: CVE-2021-3762
Creator: NVD / NIST
Published: 2022-03-03T22:15:08.467+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.51%

Last modified Jun 17, 2026

CVE-2021-3762 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A directory traversal vulnerability was found in the ClairCore engine of Clair. An attacker can exploit this by supplying a crafted container image which, when scanned by Clair, allows for arbitrary file write on the filesystem, potentially allowing for remote code execution.. EPSS estimates a 4.51% chance of exploitation in the next 30 days.

Description

A directory traversal vulnerability was found in the ClairCore engine of Clair. An attacker can exploit this by supplying a crafted container image which, when scanned by Clair, allows for arbitrary file write on the filesystem, potentially allowing for remote code execution.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

4.51%

90.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Clair	>= 0.4.6, < 0.4.8
Redhat	Clair	>= 0.5.3, < 0.5.5
Redhat	Quay	3.5.6

References

https://bugzilla.redhat.com/show_bug.cgi?id=2000795Issue Tracking, Patch, Third Party Advisory
https://github.com/quay/clair/pull/1379Patch, Third Party Advisory
https://github.com/quay/clair/pull/1380Patch, Third Party Advisory
https://github.com/quay/claircore/commit/691f2023a1720a0579e688b69a2f4bfe1f4b7821Patch, Third Party Advisory
https://github.com/quay/claircore/pull/478Patch, Third Party Advisory
https://vulmon.com/exploitdetails?qidtp=maillist_oss_security&qid=d19fce9ede06e13dfb5630ece7f14f83Exploit, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2000795Issue Tracking, Patch, Third Party Advisory
https://github.com/quay/clair/pull/1379Patch, Third Party Advisory
https://github.com/quay/clair/pull/1380Patch, Third Party Advisory
https://github.com/quay/claircore/commit/691f2023a1720a0579e688b69a2f4bfe1f4b7821Patch, Third Party Advisory
https://github.com/quay/claircore/pull/478Patch, Third Party Advisory
https://vulmon.com/exploitdetails?qidtp=maillist_oss_security&qid=d19fce9ede06e13dfb5630ece7f14f83Exploit, Third Party Advisory

Timeline

Published: Mar 3, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3762?

How severe is CVE-2021-3762?

CVE-2021-3762 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.51% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3762?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3762?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST