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Vulnerability of Net-SNMP: denial of service via ICMP-MIB

Synthesis of the vulnerability 

An attacker can send an ICMP packet with a large type, to a system monitored by the ICMP-MIB of Net-SNMP, in order to trigger a denial of service.
Vulnerable products: Fedora, Net-SNMP, openSUSE, RHEL, Ubuntu.
Severity of this weakness: 3/4.
Creation date: 26/02/2014.
Références of this bulletin: BID-65867, CVE-2014-2284, FEDORA-2014-3423, FEDORA-2014-3427, MDVSA-2015:092, openSUSE-SU-2014:0398-1, openSUSE-SU-2014:0399-1, RHSA-2014:0321-01, USN-2166-1, VIGILANCE-VUL-14310.

Description of the vulnerability 

When Net-SNMP is installed on Linux, it uses the ICMP-MIB provided by the system, which indicates information related to the ICMP protocol.

The icmpMsgStatsTable table contains statistics about each ICMP message type. However, Net-SNMP manages only 11 (IPv4) or 14 (IPv6) types, whereas Linux provides information for 256 types.

An attacker can therefore send an ICMP packet with a large type, to a system monitored by the ICMP-MIB of Net-SNMP, in order to trigger a denial of service.
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This threat announce impacts software or systems such as Fedora, Net-SNMP, openSUSE, RHEL, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity alert is important.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this security alert.

Solutions for this threat 

Net-SNMP: version 5.7.2.1.
The version 5.7.2.1 is fixed:
  http://www.net-snmp.org/download.html

Net-SNMP: version 5.6.2.1.
The version 5.6.2.1 is fixed:
  http://www.net-snmp.org/download.html

Net-SNMP: version 5.5.2.1.
The version 5.5.2.1 is fixed:
  http://www.net-snmp.org/download.html

Fedora: new net-snmp packages.
New packages are available:
  Fedora 19: net-snmp 5.7.2-14.fc19
  Fedora 20: net-snmp 5.7.2-17.fc20

Mandriva BS2: new net-snmp packages.
New packages are available:
  Mandriva BS2: net-snmp 5.7.2-14.1.mbs2

openSUSE: new net-snmp packages.
New packages are available:
  openSUSE 11.4: net-snmp 5.6.1-4.35.1
  openSUSE 12.3: net-snmp 5.7.2-3.8.1
  openSUSE 13.1: net-snmp 5.7.2-9.4.1

RHEL 6.5: new net-snmp packages.
New packages are available:
  RHEL 6: net-snmp 5.5-49.el6_5.1

Ubuntu: new libsnmp packages.
New packages are available:
  Ubuntu 13.10: libsnmp30 5.7.2~dfsg-8ubuntu1.1
  Ubuntu 12.10: libsnmp15 5.4.3~dfsg-2.5ubuntu1.1
  Ubuntu 12.04 LTS: libsnmp15 5.4.3~dfsg-2.4ubuntu1.2
  Ubuntu 10.04 LTS: libsnmp15 5.4.2.1~dfsg0ubuntu1-0ubuntu2.3
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