Your submission was sent successfully! Close

You have successfully unsubscribed! Close

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.

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.

Priority

Low

Cvss 3 Severity Score

5.3

Score breakdown

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

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N