CVE-2019-3856

Name	CVE-2019-3856
Description	An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
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-1730-1, DSA-4431-1
Debian Bugs	924965

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libssh2 (PTS)	bullseye	1.9.0-2+deb11u1	fixed
	bookworm	1.10.0-3	fixed
	sid, trixie	1.11.1-1	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
libssh2	source	jessie	1.4.3-4.1+deb8u2	DLA-1730-1
libssh2	source	stretch	1.7.0-1+deb9u1	DSA-4431-1
libssh2	source	(unstable)	1.8.0-2.1		924965

https://www.libssh2.org/CVE-2019-3856.html
Patch: https://libssh2.org/1.8.0-CVE/CVE-2019-3856.patch
https://github.com/libssh2/libssh2/pull/315