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-200611-06] OpenSSH: Multiple Denial of Service vulnerabilities


Vulnerability Assessment Details

[GLSA-200611-06] OpenSSH: Multiple Denial of Service vulnerabilities

Vulnerability Assessment Summary
OpenSSH: Multiple Denial of Service vulnerabilities

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200611-06
(OpenSSH: Multiple Denial of Service vulnerabilities)


Tavis Ormandy of the Google Security Team has discovered a
pre-authentication vulnerability, causing sshd to spin until the login
grace time has been expired. Mark Dowd found an unsafe signal handler
that was vulnerable to a race condition. It has also been discovered
that when GSSAPI authentication is enabled, GSSAPI will in certain
cases incorrectly abort.

Impact

The pre-authentication and signal handler vulnerabilities can cause a
Denial of Service in OpenSSH. The vulnerability in the GSSAPI
authentication abort could be used to acertain the validity of
usernames on some platforms.

Workaround

There is no known workaround at this time.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5051
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5052
http://www.openssh.com/txt/release-4.4


Solution:
All OpenSSH users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/openssh-4.4_p1-r5"


Network Security Threat Level: Medium


Networks Security ID:

Vulnerability Assessment Copyright: (C) 2006 Michel Arboi

Cables, Connectors

Foldable Desk Floor Stand Lazy Bed Tablet Holder Mount for iPad 2 3 4 5 Samsung
$10.59
Foldable Desk Floor Stand Lazy Bed Tablet Holder Mount for iPad 2 3 4 5 Samsung pictureSamsung Galaxy Tab S2 9.7 T819Y Wi-Fi + 4G 32GB Tablet Gold 2016 UU
$492.3
Samsung Galaxy Tab S2 9.7 T819Y Wi-Fi + 4G 32GB Tablet Gold 2016 UU picture4 Port Travel Charger+USB Cable for Samsung SM-P905 4G LTE Galaxy Note Pro 12.2
$26.35
4 Port Travel Charger+USB Cable for Samsung SM-P905 4G LTE Galaxy Note Pro 12.2 picture1-cell Battery for SAMSUNG Galaxy Tab 3 8.0 T3100 T3110 T310 T311 T315 tablets
$17.99
1-cell Battery for SAMSUNG Galaxy Tab 3 8.0 T3100 T3110 T310 T311 T315 tablets picture


Discussions

No Discussions have been posted on this vulnerability.