CVE-2018-18066

Publication date 8 October 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

snmp_oid_compare in snmplib/snmp_api.c in Net-SNMP before 5.8 has a NULL Pointer Exception bug that can be used by an unauthenticated attacker to remotely cause the instance to crash via a crafted UDP packet, resulting in Denial of Service.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
net-snmp	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

this is a duplicate of CVE-2015-5621 which was fixed in USN-2711-1 0025-Bug-788964-net-snmp-snmp_pdu_parse-DoS.patch in bionic CVE-2015-5621.patch in xenial

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
net-snmp	Upstream: https://sourceforge.net/p/net-snmp/code/ci/f23bcd3ac6ddee5d0a48f9703007ccc738914791/

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H