Vulnerability Assessment & Network Security Forums



If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200609-17] OpenSSH: Denial of Service


Vulnerability Assessment Details

[GLSA-200609-17] OpenSSH: Denial of Service

Vulnerability Assessment Summary
OpenSSH: Denial of Service

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200609-17
(OpenSSH: Denial of Service)


Tavis Ormandy of the Google Security Team discovered a Denial of
Service vulnerability in the SSH protocol version 1 CRC compensation
attack detector.

Impact

A remote unauthenticated attacker may be able to trigger excessive CPU
usage by sending a pathological SSH message, denying service to other
legitimate users or processes.

Workaround

The system administrator may disable SSH protocol version 1 in
/etc/ssh/sshd_config.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4924


Solution:
All OpenSSH users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/openssh-4.3_p2-r5"


Network Security Threat Level: Medium


Networks Security ID:

Vulnerability Assessment Copyright: (C) 2006 Michel Arboi

Cables, Connectors

Genuine Toshiba Satellite P755 Series 15.6 Intel Motherboard K000128590 LA-6832P
$119.99
Genuine Toshiba Satellite P755 Series 15.6 Intel Motherboard K000128590 LA-6832P pictureMotherboard HP DV7-7000 (48.4st10.031 / Socket Intel / GeForce GT630M) TESTED
$70.0
Motherboard HP DV7-7000 (48.4st10.031 / Socket Intel / GeForce GT630M) TESTED pictureGenuine IBM THINKPAD T40 T41 T42 MOTHERBOARD 93P3301 93P3310
$23.6
Genuine IBM THINKPAD T40 T41 T42 MOTHERBOARD 93P3301 93P3310 pictureMotherboard Lenovo X230 Intel Core i7-3520M 100% TESTED
$130.0
Motherboard Lenovo X230 Intel Core i7-3520M 100% TESTED picture


Discussions

No Discussions have been posted on this vulnerability.