CVE-2019-19269

Name	CVE-2019-19269
Description	An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.
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-2018-1
Debian Bugs	946345

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
proftpd-dfsg (PTS)	bullseye	1.3.7a+dfsg-12+deb11u2	fixed
	bookworm	1.3.8+dfsg-4+deb12u3	fixed
	sid	1.3.8.b+dfsg-3	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
proftpd-dfsg	source	jessie	1.3.5e+r1.3.5-2+deb8u5	DLA-2018-1
proftpd-dfsg	source	stretch	1.3.5b-4+deb9u3
proftpd-dfsg	source	buster	1.3.6-4+deb10u3
proftpd-dfsg	source	(unstable)	1.3.6b-2		946345

Notes

https://github.com/proftpd/proftpd/issues/861
https://github.com/proftpd/proftpd/commit/81cc5dce4fc0285629a1b08a07a109af10c208dd (master)
https://github.com/proftpd/proftpd/commit/be8e1687819cb665359bd62b4c896ff4b1a09c3f (1.3.6 branch)