CVE-2023-5870

Name	CVE-2023-5870
Description	A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3651-1, DSA-5553-1, DSA-5554-1
Debian Bugs	1056283

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
postgresql-13 (PTS)	bullseye	13.16-0+deb11u1	fixed
	bullseye (security)	13.18-0+deb11u1	fixed
postgresql-15 (PTS)	bookworm	15.8-0+deb12u1	fixed
	bookworm (security)	15.10-0+deb12u1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
postgresql-11	source	buster	11.22-0+deb10u1	DLA-3651-1
postgresql-11	source	(unstable)	(unfixed)
postgresql-13	source	bullseye	13.13-0+deb11u1	DSA-5554-1
postgresql-13	source	(unstable)	(unfixed)
postgresql-15	source	bookworm	15.5-0+deb12u1	DSA-5553-1
postgresql-15	source	(unstable)	(unfixed)		1056283
postgresql-16	source	(unstable)	16.1-1

Notes

https://www.postgresql.org/support/security/CVE-2023-5870/
https://www.postgresql.org/about/news/postgresql-161-155-1410-1313-1217-and-1122-released-2749/