CVE-2018-18065 : What You Need to Know

A vulnerability was found in Net-SNMP version prior to 5.8, allowing an authenticated attacker to exploit a bug in the _set_key function, leading to a Denial of Service by crashing the targeted instance with a crafted UDP packet.

Understanding CVE-2018-18065

This CVE involves a NULL Pointer Exception in Net-SNMP before version 5.8, which can be exploited remotely to cause a Denial of Service.

What is CVE-2018-18065?

The vulnerability in Net-SNMP version prior to 5.8 lies in the _set_key function in agent/helpers/table_container.c, enabling an authenticated attacker to crash the instance by sending a specially crafted UDP packet.

The Impact of CVE-2018-18065

Exploiting this vulnerability could result in a Denial of Service, causing the targeted instance to crash.

Technical Details of CVE-2018-18065

This section provides more technical insights into the vulnerability.

Vulnerability Description

The _set_key function in agent/helpers/table_container.c in Net-SNMP before 5.8 contains a bug that results in a NULL Pointer Exception, exploitable by an authenticated attacker.

Affected Systems and Versions

Product: Net-SNMP
Versions affected: Prior to 5.8

Exploitation Mechanism

An authenticated attacker can exploit this vulnerability by sending a specially crafted UDP packet to the targeted instance, causing it to crash.

Mitigation and Prevention

To address CVE-2018-18065, follow these mitigation strategies:

Immediate Steps to Take

Update Net-SNMP to version 5.8 or later to mitigate the vulnerability.
Implement network segmentation to limit access to SNMP services.

Long-Term Security Practices

Regularly monitor and patch SNMP implementations for known vulnerabilities.
Conduct security assessments to identify and address potential weaknesses in SNMP configurations.

Patching and Updates

Apply patches and updates provided by Net-SNMP to fix the vulnerability and enhance system security.