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AUSCERT Security Bulletin
ASB-2013.0100
A vulnerability has been identified in multiple McAfee products.
13 August 2013
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AusCERT Security Bulletin Summary
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Product: Email and Web Security Appliances (EWS) 5.6
McAfee Email Gateway (MEG) 7.0. 7.5
McAfee Web Gateway (MWG) 7.3.2
McAfee Firewall Enterprise (MFE) 8.2.1, 8.3.1
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2013-4854
Member content until: Thursday, September 12 2013
Reference: ASB-2013.0093
ESB-2013.1037
ESB-2013.1032
ESB-2013.1021
ESB-2013.1020
ESB-2013.1019
OVERVIEW
A vulnerability in has been identified in the following McAfee
products:
Email and Web Security Appliances (EWS) 5.6
McAfee Email Gateway (MEG) 7.0. 7.5
McAfee Web Gateway (MWG) 7.3.2
McAfee Firewall Enterprise (MFE) 8.2.1, 8.3.1 [1]
IMPACT
The vendor has provided the following details regarding this issue:
"CVE-2013-4854 describes a vulnerability in ISC BIND. A specially
crafted query that includes malformed RDATA can cause named1 to
terminate with an assertion failure while rejecting the malformed
query.
The listed McAfee products use the BIND server (named) as a local
caching DNS server to reduce the number of remote DNS queries they
have to perform, resulting in improved performance. By default,
these products do not listen for remote DNS queries. Only McAfee
Firewall Enterprise (MFE) includes an option to configure and
respond to remote queries.
If the local BIND server receives one of the malformed queries, all
listed products will fail closed in a manner that does not leave the
Appliance in a state that will allow traffic that the configuration
normally disallows. Should the BIND server unexpectedly stop
(crash), all McAfee Appliances will restart the BIND services and
normal operation will continue.
Due to the nature of the products, how they utilize Bind, and their
fail closed architecture, there is minimal risk that the Appliances
may be successfully subverted through this BIND vulnerability. If
you calculate a CVSS environment score, please factor in the
mitigations designed into McAfee Appliances." [1]
MITIGATION
The vendor recommends applying the latest patch to correct these
issues. [1]
REFERENCES
[1] McAfee Security Bulletin - Updates for multiple McAfee Network
products resolve BIND vulnerability
https://kc.mcafee.com/corporate/index?page=content&id=SB10052
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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