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Rule:
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Sid:
1421
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Summary:
This event is generated when an attempt is made to attack a device using
SNMP v1.
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Impact:
Varies depending on the implementation. Ranges from Denial of Service
(DoS) to code execution.
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Detailed Information:
SNMP is a widely adopted protocol for managing IP networks, including
individual network devices, and devices in aggregate.
Several network devices come pre-installed with this protocol for
management and monitoring.
A number of vulnerabilities exist in SNMP v1, including a community
string buffer overflow, that will allow an attacker to execute arbitrary
code or shutdown the service.
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Affected Systems:
Any implementation of the SNMP v1 protocol
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Attack Scenarios:
An attacker needs to send a specially crafted packet to UDP port 705
of a vulnerable device, causing a Denial of Service or possible
execution of arbitrary code.
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Ease of Attack:
Simple.
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False Positives:
None known.
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False Negatives:
None known.
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Corrective Action:
Disable the SNMP v1 protocol, use SNMP v2 protocol as an alternative.
Disable the use of SNMP for devices that do not need it.
Use Ingress/Egress filtering on a packet filtering firewall.
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Contributors:
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>
Snort documentation contributed by Nawapong Nakjang (tony@ksc.net, tonie@thai.com)
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Additional References:
CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0012
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0013
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