drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Denial of Service in DenyHosts
Name: |
Denial of Service in DenyHosts |
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ID: |
200701-01 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Mi, 3. Januar 2007, 19:31 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6301 |
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Applikationen: |
DenyHosts |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200701-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: DenyHosts: Denial of Service Date: January 03, 2007 Bugs: #157163 ID: 200701-01
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Synopsis ========
DenyHosts does not correctly parse log entries, potentially causing a remote Denial of Service.
Background ==========
DenyHosts is designed to monitor SSH servers for repeated failed login attempts.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-admin/denyhosts < 2.6 >= 2.6
Description ===========
Tavis Ormandy of the Gentoo Linux Security Audit Team discovered that DenyHosts used an incomplete regular expression to parse failed login attempts.
Impact ======
A remote unauthenticated attacker can add arbitrary hosts to the blacklist by attempting to login with a specially crafted username. An attacker may use this to prevent legitimate users from accessing a host remotely.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All DenyHosts users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-admin/denyhosts-2.6"
References ==========
[ 1 ] CVE-2006-6301 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6301
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200701-01.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 2007 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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