CVE-2024-28820

Name	CVE-2024-28820
Description	Buffer overflow in the extract_openvpn_cr function in openvpn-cr.c in openvpn-auth-ldap (aka the Three Rings Auth-LDAP plugin for OpenVPN) 2.0.4 allows attackers with a valid LDAP username and who can control the challenge/response password field to pass a string with more than 14 colons into this field and cause a buffer overflow.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1074425

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openvpn-auth-ldap (PTS)	bullseye	2.0.4-1	vulnerable
	bookworm	2.0.4-3	vulnerable
	trixie	2.0.4-4	fixed
	forky, sid	2.0.4-5	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
openvpn-auth-ldap	source	(unstable)	2.0.4-4			1074425

Notes

[bookworm] - openvpn-auth-ldap <no-dsa> (Minor issue)
[bullseye] - openvpn-auth-ldap <no-dsa> (Minor issue)
https://github.com/threerings/openvpn-auth-ldap/pull/92