OpenSSH < 4.5 Multiple Vulnerabilities

high Nessus Plugin ID 44077

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Synopsis

The remote SSH service is affected by multiple vulnerabilities.

Description

According to its banner, the remote host is running a version of OpenSSH prior to 4.5. Versions before 4.5 are affected by the following vulnerabilities :

- A client-side NULL pointer dereference, caused by a protocol error from a malicious server, which could cause the client to crash. (CVE-2006-4925)

- A privilege separation vulnerability exists, which could allow attackers to bypass authentication. The vulnerability is caused by a design error between privileged processes and their child processes. Note that this particular issue is only exploitable when other vulnerabilities are present. (CVE-2006-5794)

- An attacker that connects to the service before it has finished creating keys could force the keys to be recreated. This could result in a denial of service for any processes that relies on a trust relationship with the server. Note that this particular issue only affects the Apple implementation of OpenSSH on Mac OS X. (CVE-2007-0726)

Solution

Upgrade to OpenSSH 4.5 or later.
For Mac OS X 10.3, apply Security Update 2007-003.
For Mac OS X 10.4, upgrade to 10.4.9.

Plugin Details

Severity: High

ID: 44077

File Name: openssh_45.nasl

Version: 1.10

Type: remote

Family: Misc.

Published: 10/4/2011

Updated: 3/27/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Vulnerability Information

CPE: cpe:/a:openbsd:openssh

Required KB Items: installed_sw/OpenSSH

Exploit Ease: No known exploits are available

Patch Publication Date: 11/8/2006

Vulnerability Publication Date: 11/8/2006

Reference Information

CVE: CVE-2006-4925, CVE-2006-5794, CVE-2007-0726

BID: 20956

Detections

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