CVE-2018-15919

Name	CVE-2018-15919
Description	Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be used by remote attackers to detect existence of users on a target system when GSS2 is in use. NOTE: the discoverer states 'We understand that the OpenSSH developers do not want to treat such a username enumeration (or "oracle") as a vulnerability.'
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs	907503

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openssh (PTS)	buster	1:7.9p1-10+deb10u2	vulnerable
	buster (security)	1:7.9p1-10+deb10u1	vulnerable
	bullseye	1:8.4p1-5+deb11u1	vulnerable
	bookworm, sid	1:9.2p1-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
openssh	source	(unstable)	(unfixed)	unimportant		907503

https://www.openwall.com/lists/oss-security/2018/08/27/2
Not treated as a security issue by upstream