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Test ID:1.3.6.1.4.1.25623.1.0.108473
Category:General
Title:libssh Server 'CVE-2018-10933' Authentication Bypass
Summary:The remote SSH server is using libssh which is prone to an authentication bypass vulnerability.
Description:Summary:
The remote SSH server is using libssh which is prone to an authentication bypass vulnerability.

Vulnerability Insight:
By presenting the server an SSH2_MSG_USERAUTH_SUCCESS message in place of the
SSH2_MSG_USERAUTH_REQUEST message which the server would expect to initiate authentication the server is authentciating
users without any credentials.

NOTE: Some server implementations using libssh (e.g. Github Enterprise) are not affected by this issue.

Vulnerability Impact:
An attacker could successfully authentciate without any credentials.

Affected Software/OS:
libssh versions starting from 0.6 and prior to 0.7.6/0.8.4.

Solution:
Update to libssh version 0.7.6, 0.8.4 or later.

CVSS Score:
6.4

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2018-10933
CopyrightCopyright (C) 2018 Greenbone Networks GmbH

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