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AUSCERT Security Bulletin
ASB-2015.0003
Vulnerabilities have been identified in NTP that is
installed with Tenable Appliance.
12 January 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Tenable Appliance
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Access Privileged Data -- Existing Account
Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2014-9296 CVE-2014-9295 CVE-2014-9294
CVE-2014-9293
Member content until: Wednesday, February 11 2015
OVERVIEW
Vulnerabilities have been identified in NTP that is installed with
Tenable Appliance. [1]
IMPACT
The vendor has provided the following details regarding this issue:
"Some of these issues may allow for remote code execution. The
issues include:
NTP ntpd/ntp_crypto.c crypto_recv() Function Packet Handling
Remote Stack Buffer Overflow
NTP ntpd/ntp_control.c configure() Function Packet Handling
Remote Stack Buffer Overflow
NTP ntpd/ntp_control.c ctl_putdata() Function Packet Handling
Remote Stack Buffer Overflow
NTP ntp-keygen MD5 Key Generation Weak RNG Seed MitM Issue
NTP Weak RSA Key Generation Modulus Unspecified Issue
NTP Extension Fields Missing vallen Validation Unspecified Issue
NTP Unspecified ::1 Spoofing Source IP ACL Bypass
NTP ntp_proto.c receive() Function Error Clause Missing return
Statement Unspecified Weakness
NTP ntpd/ntp_config.c config_auth() Weak Default Key Generation
While the NTP service may allow remote traffic, best practices say
that such an appliance should not be Internet accessable. If
deployed in accordance with best practices, attacks would have to be
conducted from an internal network." [1]
MITIGATION
The vendor recommends upgrading to the latest version of Tenable
Appliance. [1]
REFERENCES
[1] [R1] NTP Vulnerabilities Affects Tenable Appliance
http://www.tenable.com/security/tns-2015-01
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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