CVE-2020-21469 Denial of service in n/a

What is CVE-2020-21469?

CVE-2020-21469 is a medium-severity denial of service vulnerability in Postgresql Postgresql, published on 22 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in PostgreSQL 12.2 allows attackers to cause a denial of service via repeatedly sending SIGHUP signals. NOTE: this is disputed by the vendor because untrusted users cannot send SIGHUP signals; they can only be sent by a PostgreSQL superuser, a user with pg_reload_conf access, or a user with sufficient privileges at the OS level (the postgres account or the root account).

Weakness: CWE-120

Which versions are affected by CVE-2020-21469?

1 open source package ship an affected version, including postgresql. It affects 1 product.

Products include Postgresql Postgresql.

How do I fix CVE-2020-21469?

Upgrade postgresql to 12.2.1 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-21469 being exploited?

There is no known exploitation of CVE-2020-21469 in the wild and no public exploit code.

Other vulnerabilities in Postgresql Postgresql

• CVE-2013-1902 Information disclosure in n/a Critical 10.0
• CVE-2013-1903 Information disclosure in n/a Critical 10.0
• CVE-2007-3279 Privilege escalation in n/a Critical 10.0
• CVE-2002-1399 Integer overflow in n/a Critical 10.0
• CVE-2016-3065 Information disclosure in n/a Critical 9.1

All Postgresql Postgresql vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-postgresql-2020-21469, ECHO-aad0-5c96-9b71, GHSA-w8hm-59h4-7ff2, UBUNTU-CVE-2020-21469.