CVE-2021-3677

Name: CVE-2021-3677
Creator: NVD / NIST
Published: 2022-03-02T23:15:08.9+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.39%

Last modified Jun 17, 2026

CVE-2021-3677 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. EPSS estimates a 1.39% chance of exploitation in the next 30 days.

Description

A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processes=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.39%

68.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Postgresql	Postgresql	>= 11.0, < 11.13
Postgresql	Postgresql	>= 12.0, < 12.8
Postgresql	Postgresql	>= 13.0, < 13.4
Redhat	Virtualization	4.0
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux For Ibm Z Systems	8.0
Redhat	Enterprise Linux For Power Little Endian	8.0
Redhat	Software Collections	1.0
Fedoraproject	Fedora	34

References

https://bugzilla.redhat.com/show_bug.cgi?id=2001857Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202211-04Third Party Advisory
https://security.netapp.com/advisory/ntap-20220407-0008/Third Party Advisory
https://www.postgresql.org/support/security/CVE-2021-3677/Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2001857Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202211-04Third Party Advisory
https://security.netapp.com/advisory/ntap-20220407-0008/Third Party Advisory
https://www.postgresql.org/support/security/CVE-2021-3677/Vendor Advisory

Timeline

Published: Mar 2, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3677?

How severe is CVE-2021-3677?

CVE-2021-3677 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.39% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3677?

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-2021-3677?

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

Scan your code now

Source: NVD / NIST