CVE-2021-3677: 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.

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2022-Mar

Released

2022-03-11

EPSS Score

0.20% (percentile: 42.3%)

FAQ

Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability? One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.

Affected Products (2)

Other

• 18896-16820
• 18891-16823

Revision History

• 2022-03-11: Information published.