CVE-2019-15680

Name	CVE-2019-15680
Description	TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.
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-2045-1
Debian Bugs	945364

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libvncserver (PTS)	bullseye	0.9.13+dfsg-2+deb11u1	vulnerable
	sid, trixie, bookworm	0.9.14+dfsg-1	vulnerable
tightvnc (PTS)	bullseye	1:1.3.10-3	fixed
	bookworm	1:1.3.10-7	fixed
	sid, trixie	1:1.3.10-9	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
italc	source	(unstable)	(unfixed)	unimportant
libvncserver	source	(unstable)	(unfixed)	unimportant
tightvnc	source	jessie	1.3.9-6.5+deb8u1		DLA-2045-1
tightvnc	source	stretch	1:1.3.9-9+deb9u1
tightvnc	source	buster	1:1.3.9-9deb10u1
tightvnc	source	(unstable)	1:1.3.9-9.1	unimportant		945364

Notes

https://www.openwall.com/lists/oss-security/2018/12/10/5
https://github.com/sunweaver/libvncserver/commit/85d00057b5daf71675462c9b175d8cb2d47cd0e1
Non-issue in libvncserver's case: https://github.com/LibVNC/libvncserver/issues/359#issuecomment-599202068