CVE-2021-22880

Name	CVE-2021-22880
Description	The PostgreSQL adapter in Active Record before 6.1.2.1, 6.0.3.5, 5.2.4.5 suffers from a regular expression denial of service (REDoS) vulnerability. Carefully crafted input can cause the input validation in the `money` type of the PostgreSQL adapter in Active Record to spend too much time in a regular expression, resulting in the potential for a DoS attack. This only impacts Rails applications that are using PostgreSQL along with money type columns that take user input.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	medium

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rails (PTS)	stretch	2:4.2.7.1-1+deb9u2	fixed
	stretch (security)	2:4.2.7.1-1+deb9u4	fixed
	buster, buster (security)	2:5.2.2.1+dfsg-1+deb10u2	vulnerable
	bullseye, sid	2:6.0.3.5+dfsg-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rails	source	stretch	(not affected)
rails	source	(unstable)	2:6.0.3.5+dfsg-1

Notes

[stretch] - rails <not-affected> (Vulnerable asterisk in regex added later)
https://discuss.rubyonrails.org/t/cve-2021-22880-possible-dos-vulnerability-in-active-record-postgresql-adapter/77129
https://hackerone.com/reports/1023899
https://github.com/rails/rails/commit/eddda4d8fb6b6508e11196b14494ceac37b57339 (main)
https://github.com/rails/rails/commit/879d02107b5b3eb7aeaad1cd1f259bb41f17286b (v6.0.3.5)