CVE-2018-18065

MEDIUM

Net-SNMP < 5.8 - Authenticated Denial of Service via Crafted UDP Packet

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-18065. PoCs published by Magnus Klaaborg Stubman.

AI-analyzed exploit summary This exploit demonstrates a remote Denial of Service (DoS) vulnerability in NET-SNMP (CVE-2018-18065) by sending a malformed base64-decoded payload to a vulnerable snmpd instance, causing a segmentation fault. The PoC includes a base64-encoded payload and a command to trigger the crash.

Description

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

Exploits (1)

exploitdb WORKING POC
by Magnus Klaaborg Stubman · textdoslinux
https://www.exploit-db.com/exploits/45547

This exploit demonstrates a remote Denial of Service (DoS) vulnerability in NET-SNMP (CVE-2018-18065) by sending a malformed base64-decoded payload to a vulnerable snmpd instance, causing a segmentation fault. The PoC includes a base64-encoded payload and a command to trigger the crash.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: NET-SNMP 5.7.3
Auth required
Prerequisites: knowledge of the SNMP community string (e.g., 'public') · network access to the target snmpd service
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (12)

Core 12
Core References
Exploit, Patch, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45547/
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3792-1/
Exploit, Patch, Third Party Advisory x_refsource_misc
https://dumpco.re/blog/net-snmp-5.7.3-remote-dos
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20181107-0001/
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3792-2/
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3792-3/
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2018/dsa-4314
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/106265
Various Sources x_refsource_confirm
https://security.paloaltonetworks.com/CVE-2018-18065

Scores

CVSS v3 6.5
EPSS 0.1706
EPSS Percentile 96.7%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (14)
canonical/ubuntu_linux 12.04
canonical/ubuntu_linux 14.04
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 18.04
canonical/ubuntu_linux 18.10
debian/debian_linux 9.0
net-snmp/net-snmp < 5.8
netapp/cloud_backup
netapp/data_ontap
netapp/e-series_santricity_os_controller 11.0 - 11.5
... and 4 more
Published Oct 08, 2018
Tracked Since Feb 18, 2026