drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in OpenSSH
Name: |
Mehrere Probleme in OpenSSH |
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ID: |
200611-06 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Mo, 13. November 2006, 23:58 |
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Referenzen: |
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 |
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Applikationen: |
Portable OpenSSH |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200611-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: OpenSSH: Multiple Denial of Service vulnerabilities Date: November 13, 2006 Bugs: #149502 ID: 200611-06
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Synopsis ========
Several Denial of Service vulnerabilities have been identified in OpenSSH.
Background ==========
OpenSSH is a complete SSH protocol version 1.3, 1.5 and 2.0 implementation and includes sftp client and server support.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/openssh < 4.4_p1-r5 >= 4.4_p1-r5
Description ===========
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 determine the validity of usernames on some platforms.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All OpenSSH users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/openssh-4.4_p1-r5"
References ==========
[ 1 ] CVE-2006-5051 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5051 [ 2 ] CVE-2006-5052 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5052 [ 3 ] OpenSSH Security Advisory http://www.openssh.com/txt/release-4.4
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200611-06.xml
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.
License =======
Copyright 2006 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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