Detections
Analytics

OpenSSH < 7.8 Access User Enumeration Vulnerability

medium Nessus Network Monitor Plugin ID 701158

Synopsis

The remote SSH server may be affected by an access user enumeration vulnerability.

Description

The installed version of OpenSSH is prior to 7.8 and is affected by 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.

Solution

Upgrade to OpenSSH 7.x version 7.8 or later.

See Also

http://www.openssh.com/txt/release-7.8

Plugin Details

Severity: Medium

ID: 701158

Family: SSH

Published: 8/21/2019

Updated: 8/21/2019

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.8

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:openbsd:openssh

Patch Publication Date: 8/17/2018

Vulnerability Publication Date: 8/17/2018

Reference Information

CVE: CVE-2018-15473

BID: 105140