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FreeBSD : libssh -- authentication bypass vulnerability (2383767c-d224-11e8-9623-a4badb2f4699)

critical Nessus Plugin ID 118182

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

gladiac reports :

libssh versions 0.6 and above have an authentication bypass vulnerability in the server code. 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 attacker could successfully authentciate without any credentials.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?6f6b157e

http://www.nessus.org/u?62863d41

Plugin Details

Severity: Critical

ID: 118182

File Name: freebsd_pkg_2383767cd22411e89623a4badb2f4699.nasl

Version: 1.6

Type: local

Published: 10/18/2018

Updated: 5/15/2020

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:libssh, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/17/2018

Vulnerability Publication Date: 10/16/2018

Reference Information

CVE: CVE-2018-10933

IAVA: 2018-A-0347-S