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CVE-2018-15473

Published: 17 August 2018

OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.

Priority

Low

CVSS 3 base score: 5.3

Status

Package Release Status
openssh
Launchpad, Ubuntu, Debian
bionic
Released (1:7.6p1-4ubuntu0.1)
cosmic
Released (1:7.7p1-4)
disco Not vulnerable

eoan Not vulnerable

focal Not vulnerable

groovy Not vulnerable

hirsute Not vulnerable

precise Ignored
(end of ESM support, was needs-triage)
trusty
Released (1:6.6p1-2ubuntu2.11)
upstream Needs triage

xenial
Released (1:7.2p2-4ubuntu2.6)
openssh-ssh1
Launchpad, Ubuntu, Debian
bionic Not vulnerable

cosmic Not vulnerable

disco Not vulnerable

eoan Not vulnerable

focal Not vulnerable

groovy Not vulnerable

hirsute Not vulnerable

precise Does not exist

trusty Does not exist

upstream Ignored
(frozen on openssh 7.5p)
xenial Does not exist

Notes

AuthorNote
seth-arnold
openssh-ssh1 is provided for compatibility with old devices that
cannot be upgraded to modern protocols. Thus we may not provide security
support for this package if doing so would prevent access to equipment.
openssh-ssh1 is a *client-only* package, no server-side facility, so
there is no path to leak data
mdeslaur
watch for regressions, see debian ELA-37-3
leosilva
for openss, cosmic is not affected, and so disco too.

References

Bugs