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Family: Gentoo Local Security Checks --> Category: infos
[GLSA-200609-17] OpenSSH: Denial of Service Vulnerability Scan
Vulnerability Scan Summary
OpenSSH: Denial of Service
Detailed Explanation for this Vulnerability Test
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"
Threat Level: Medium
Click HERE for more information and discussions on this network vulnerability scan.
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