BIND Security CVE2013-4854


Aug 17, 2010
Anyone can help me how can we get and apply security patch for this?

IMPORTANT: The security issue described below has been confirmed by ISC
to be 'in the wild' as of 18:00UTC July 26, and exploitation of this
vulnerability against production servers has been reported by multiple
organizations. Please be advised that immediate action is recommended.

A specially crafted query can cause BIND to terminate
CVE: CVE-2013-4854
Document Version: 2.0
Posting date: 26 July 2013
Program Impacted: BIND
Versions affected: Open source: 9.7.0->9.7.7, 9.8.0->9.8.5-P1,
9.9.0->9.9.3-P1, 9.8.6b1 and 9.9.4b1;
Subscription: 9.9.3-S1 and 9.9.4-S1b1
Severity: Critical
Exploitable: Remotely

A specially crafted query that includes malformed rdata can cause
named to terminate with an assertion failure while rejecting the
malformed query.

BIND 9.6 and BIND 9.6-ESV are unaffected by this problem. Earlier
branches of BIND 9 are believed to be unaffected but have not
been tested. BIND 10 is also unaffected by this issue.

Please Note: All versions of BIND 9.7 are known to be affected,
but these branches are beyond their "end of life" (EOL) and no
longer receive testing or security fixes from ISC. For current
information on which versions are actively supported, please see

Internet Systems Consortium | BIND Software Status.


Authoritative and recursive servers are equally vulnerable.
Intentional exploitation of this condition can cause a denial
of service in all nameservers running affected versions of BIND
9. Access Control Lists do not provide any protection from
malicious clients.

In addition to the named server, applications built using libraries
from the affected source distributions may crash with assertion
failures triggered in the same fashion.

CVSS Score: 7.8

CVSS Equation: (AV:N/AC:L/Au:N/C:N/I:N/A:C)

For more information on the Common Vulnerability Scoring System and
to obtain your specific environmental score please visit:
National Vulnerability Database CVSS Scoring


No known workarounds at this time.

Active exploits:

Crashes have been reported by multiple ISC customers. First
observed in the wild on 26 July 2013, 18:00 UTC.


Upgrade to the patched release most closely related to your
current version of BIND. Open source versions can all be
downloaded from Internet Systems Consortium | Downloads. Subscription
version customers will be contacted directly by ISC Support
regarding delivery.

BIND 9 version 9.8.5-P2
BIND 9 version 9.9.3-P2
BIND 9 version 9.9.3-S1-P1 (Subscription version available via DNSco)


ISC would like to thank Maxim Shudrak and the HP Zero Day
Initiative for reporting this issue.

Document Revision History:

1.0 Phase One Advance Notification, 18 July 2013
1.1 Phases Two and Three Advance Notification, 26 July 2013
2.0 Notification to public (Phase Four), 26 July 2013


Well-Known Member
Sep 14, 2004
inside a catfish
cPanel Access Level
Root Administrator

From where you get this acknowledge regarding this ? as i didn't received any email from cPanel itself.
The likely reason why you didn't receive an email from cPanel regarding this CVE is because this is not a cPanel specific issue. It's specific to any OS running one of the vulnerable versions of Bind. It's OS-related (RHEL, CentOS, Ubuntu, etc) rather than cPanel-related.

You can get the information directly from the ISC website -- right from the horses' mouth, if you wish:

If you're running RHEL or CentOS as your OS, you might want to follow the bugzilla writeup on the current status of any update for RHEL. Once Redhat releases an update, it'll trickle down to CentOS users and thus be available as an update in CentOS.



Staff member
Apr 11, 2011
Hello :)

Updates to Bind are provided by operating system vendors (e.g. CentOS, RedHat). You can find more information on this case at:

RedHat Security - CVE-2013-4854

You should be able to update Bind with your system package manager (YUM) when an update is made available by your OS vendor.

Thank you.


Staff member
Apr 11, 2011
Updated bind packages have been pushed out by Red Hat and CentOS to address this security concern. You can use your system package manager to update your system. EX:

yum update
You should see the fix in the RPM change log after updating:

[~]# rpm -q --changelog bind | grep CVE-2013-4854
- fix CVE-2013-4854
Thank you.