Debian DSA-1212-1 : openssh - Denial of service

high Nessus Plugin ID 23661

Synopsis

The remote Debian host is missing a security-related update.

Description

Two denial of service problems have been found in the OpenSSH server.
The Common Vulnerabilities and Exposures project identifies the following vulnerabilities :

- CVE-2006-4924 The sshd support for ssh protocol version 1 does not properly handle duplicate incoming blocks. This could allow a remote attacker to cause sshd to consume significant CPU resources leading to a denial of service.

- CVE-2006-5051 A signal handler race condition could potentially allow a remote attacker to crash sshd and could theoretically lead to the ability to execute arbitrary code.

Solution

Upgrade the openssh package.

For the stable distribution (sarge), these problems have been fixed in version 1:3.8.1p1-8.sarge.6.

For the unstable and testing distributions, these problems have been fixed in version 1:4.3p2-4.

Plugin Details

Severity: High

ID: 23661

File Name: debian_DSA-1212.nasl

Version: 1.19

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 11/20/2006

Updated: 1/4/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 7.3

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:3.1, p-cpe:/a:debian:debian_linux:openssh

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/15/2006

Vulnerability Publication Date: 9/25/2006

Reference Information

CVE: CVE-2006-4924, CVE-2006-5051

BID: 20216, 20241

CWE: 362, 399

DSA: 1212

Detections

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