CVE-2021-3677

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.

How to fix CVE-2021-3677

To remediate CVE-2021-3677, upgrade the affected package to a fixed version below.

• —upgrade to 12.8-r0 or later
• —upgrade to 13.4-r0 or later
• —upgrade to 13.4-r0 or later
• —upgrade to 13.4-r0 or later
• —upgrade to 11.13.0 or later
• —upgrade to 13.4-0+deb11u1 or later

Is CVE-2021-3677 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (6)

• from 0, < 12.8-r0
• from 0, < 13.4-r0
• from 0, < 13.4-r0
• from 0, < 13.4-r0
• >= 11.0.0, < 11.13.0, >= 12.0.0, < 12.8.0, >= 13.0.0, < 13.4.0
• from 0, < 13.4-0+deb11u1

CVSS scores

References (7)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2021-3677
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-3677
• WEBbugzilla.redhat.com/show_bug.cgi?id=2001857
• WEBnvd.nist.gov/vuln/detail/CVE-2021-3677
• WEB