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CVE-2018-15473

Publication date 17 August 2018

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
openssh 21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Not affected
18.10 cosmic
Fixed 1:7.7p1-4
18.04 LTS bionic
Fixed 1:7.6p1-4ubuntu0.1
16.04 LTS xenial
Fixed 1:7.2p2-4ubuntu2.6
14.04 LTS trusty
Fixed 1:6.6p1-2ubuntu2.11
openssh-ssh1 21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco
Not affected
18.10 cosmic
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

Notes

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.

Severity score breakdown

Parameter Value
Base score 5.3 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N