CVE-2020-13645

Name	CVE-2020-13645
Description	In GNOME glib-networking through 2.64.2, the implementation of GTlsClientConnection skips hostname verification of the server's TLS certificate if the application fails to specify the expected server identity. This is in contrast to its intended documented behavior, to fail the certificate verification. Applications that fail to provide the server identity, including Balsa before 2.5.11 and 2.6.x before 2.6.1, accept a TLS certificate if the certificate is valid for any host.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	961756

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
glib-networking (PTS)	bullseye	2.66.0-2	fixed
	bookworm	2.74.0-4	fixed
	sid, trixie	2.80.0-1	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
glib-networking	source	stretch	2.50.0-1+deb9u1
glib-networking	source	buster	2.58.0-2+deb10u1
glib-networking	source	(unstable)	2.64.3-2	961756

Notes

https://gitlab.gnome.org/GNOME/glib-networking/-/issues/135
Updating glib-networking to address CVE-2020-13645 will need a compatibility
update as well for balsa (cf. https://bugs.debian.org/961792)