CVE-2018-15919

2018-08-2800:00:00

ubuntu.com

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

0.003 Low

EPSS

Percentile

65.1%

JSON

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.’

Bugs

Notes

Author	Note
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.
mdeslaur	SUSE reverted the fix for this issue because of a regression per the post to oss-security, upstream doesn’t conside this to be a security issue, and as of 2020-07-07, there is no upstream fix for this. We will not be fixing this issue in Ubuntu.