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Test Kennung:1.3.6.1.4.1.25623.1.0.103948
Kategorie:JunOS Local Security Checks
Titel:Junos DNSSEC validation Denial of Service
Zusammenfassung:Heavy DNSSEC validation load can cause assertion failure in Bind;of Junos OS.
Beschreibung:Summary:
Heavy DNSSEC validation load can cause assertion failure in Bind
of Junos OS.

Vulnerability Insight:
BIND stores a cache of query names that are known to be failing
due to misconfigured name servers or a broken chain of trust. Under high query loads, when DNSSEC
validation is active, it is possible for a condition to arise in which data from this cache of failing
queries could be used before it was fully initialized, triggering an assertion failure.

Vulnerability Impact:
An attacker that is able to generate high volume of DNSSEC
validation enabled queries can trigger the assertion failure that causes it to crash, resulting in a
denial of service.

Affected Software/OS:
Junos OS software build before 2013-02-13.

Solution:
New builds of Junos OS software are available from Juniper. As
a workaround disable the security extension if DNSSEC is not required by typing delete system services
dns dnssec.

CVSS Score:
7.8

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Querverweis: BugTraq ID: 54658
Common Vulnerability Exposure (CVE) ID: CVE-2012-3817
http://lists.apple.com/archives/security-announce/2013/Sep/msg00002.html
Debian Security Information: DSA-2517 (Google Search)
http://www.debian.org/security/2012/dsa-2517
RedHat Security Advisories: RHSA-2012:1122
http://rhn.redhat.com/errata/RHSA-2012-1122.html
RedHat Security Advisories: RHSA-2012:1123
http://rhn.redhat.com/errata/RHSA-2012-1123.html
http://www.securitytracker.com/id?1027296
http://secunia.com/advisories/51096
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2012&m=slackware-security.536004
SuSE Security Announcement: openSUSE-SU-2012:0969 (Google Search)
http://lists.opensuse.org/opensuse-updates/2012-08/msg00013.html
SuSE Security Announcement: openSUSE-SU-2012:0971 (Google Search)
http://lists.opensuse.org/opensuse-updates/2012-08/msg00015.html
http://www.ubuntu.com/usn/USN-1518-1
CopyrightThis script is Copyright (C) 2013 Greenbone Networks GmbH

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