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Test ID:
Title:OpenSSH User Enumeration Vulnerability-Aug18 (Linux)
Summary:This host is installed with openssh and; is prone to user enumeration vulnerability.
This host is installed with openssh and
is prone to user enumeration vulnerability.

Vulnerability Insight:
The flaw is 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

Vulnerability Impact:
Successfully exploitation will allow remote
attacker to test whether a certain user exists or not (username enumeration)
on a target OpenSSH server.

Impact Level: Application

Affected Software/OS:
OpenSSH versions 7.7 and prior on Linux

No known solution is available as of 21st
August, 2018. Information regarding this issue will be updated once solution
details are available. For updates refer to Reference links.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2018-15473
CopyrightCopyright (C) 2018 Greenbone Networks GmbH

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