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Public proof of conceptFix available

CVE-2018-18065

A public proof of concept exists; no exploitation attested.

  • Published2018-10-08
  • Fixed in5.8
  • WeaknessCWE-476

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2018-10-08Exploit-DB entryExploit-DB

Versions per branch

NVD
Net-snmp
BranchAffectedFixed in
5.8< 5.85.8
Canonical ubuntu linux
BranchAffectedFixed in
12.4= 12.04no fix published
14.4= 14.04no fix published
16.4= 16.04no fix published
18.4= 18.04no fix published
18.10= 18.10no fix published
Palo Alto PAN-OS
BranchAffectedFixed in
7.1≤ 7.1.22no fix published
8.0≥ 7.1.23, ≤ 8.0.15no fix published
8.x≥ 8.0.16, ≤ 8.1.6no fix published

7 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • net-snmpUbuntu:18.04:LTSall versions · fixed in 5.7.3+dfsg-1.8ubuntu3.1
  • net-snmpUbuntu:16.04:LTSall versions · fixed in 5.7.3+dfsg-1ubuntu4.2
  • net-snmpUbuntu:14.04:LTSall versions · fixed in 5.7.2~dfsg-8.1ubuntu3.3
  • net-snmpSUSE:OpenStack Cloud 7all versions · fixed in 5.7.3-6.3.1
  • net-snmpSUSE:Manager Server 4.1all versions · fixed in 5.7.3-10.9.1
  • net-snmpSUSE:Manager Retail Branch Server 4.1all versions · fixed in 5.7.3-10.9.1
  • net-snmpSUSE:Manager Proxy 4.1all versions · fixed in 5.7.3-10.9.1
  • net-snmpSUSE:Linux Enterprise Software Development Kit 12 SP3all versions · fixed in 5.7.3-6.3.1

34 more package ranges on OSV.dev

Vendor advisories

  • CVE-2018-18065 Red Hat Product Security

    net-snmp: NULL pointer exception in _set_key in agent/helpers/table_container.c resulting in a denial of service

  • ICSA-20-042-02 CISA19 known affected

    Siemens Industrial Products SNMP (Update F)

    IE/PB link PN IO (6GK1411-5AB10) · SCALANCE S602 · SCALANCE S612 · +16 more

  • SSA-978220 Siemens ProductCERT19 known affected

    SSA-978220: Denial of Service Vulnerability over SNMP in Multiple Industrial Products

    IE/PB link PN IO (6GK1411-5AB10) · SCALANCE S602 · SCALANCE S612 · +16 more

Full record on NVD

Fix

  1. Update Net-snmp to 5.8
  2. Vendor fix Siemens ProductCERT SSA-978220 · 5 productsUpdate to V3.3 or later version
  3. Vendor fix Siemens ProductCERT SSA-978220 · 4 productsUpdate to V4.1 Update is only available via Siemens Support contact
  4. Vendor fix Siemens ProductCERT SSA-978220 · 1 productThe updated firmware is contained in SIMATIC NET PC Software V14 Update 14 or later version or SIMATIC NET PC Software V16 or later version
  5. Vendor fix Siemens ProductCERT SSA-978220 · 1 productUpdate to V1.1.1 or later version
  6. Vendor fix Siemens ProductCERT SSA-978220 · 1 productUpdate to SIMATIC NET PC Software V16 or later version
  7. Vendor fix CISA ICSA-20-042-02 · 5 productsUpdate to V3.3 or later version

Advisories and patches

Detection

read 2026-11-09 09:28 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-45547
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published
2018-10-08
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-j2x7-g8jc-3475

Frequently asked questions

What is CVE-2018-18065?

_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.

Is CVE-2018-18065 actively exploited?

Active exploitation of CVE-2018-18065 has not been confirmed. Its EPSS score was 17.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-18065?

CVE-2018-18065 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record