Net-SNMP: Denial of Service

Security Team  Contact Address

Updated November 20, 2007

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200711-31 / net-snmp
Release Date November 20, 2007
Latest Revision November 20, 2007: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-analyzer/net-snmp < 5.4.1-r1 >= 5.4.1-r1 All supported architectures

Related bugreports: #198346

Synopsis

A Denial of Service vulnerability has been discovered in Net-SNMP when processing GETBULK requests.

2.  Impact Information

Background

Net-SNMP is a collection of tools for generating and retrieving SNMP data.

Description

The SNMP agent (snmpd) does not properly handle GETBULK requests with an overly large "max-repetitions" field.

Impact

A remote unauthenticated attacker could send a specially crafted SNMP request to the vulnerable application, possibly resulting in a high CPU and memory consumption.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Net-SNMP users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/net-snmp-5.4.1-r1"

4.  References