HOMEVULNERABILITIESCVE-2018-18065
MEDIUMPOC

CVE-2018-18065

CWE-476Published: October 8, 2018· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2018-18065 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

A proof-of-concept (PoC) exploit exists for CVE-2018-18065. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
net-snmp1 product(s)
net-snmp
netapp6 product(s)
cloud backuphyper converged infrastructurestoragegrid webscaledata ontape-series santricity os controllersolidfire element os
Palo Alto Networks1 product(s)
pan-os
Source: NVD CPE · 14 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://dumpco.re/blog/net-snmp-5.7.3-remote-dos
PATCHhttps://sourceforge.net/p/net-snmp/code/ci/7ffb8e25a0db851953155de91f0170e9bf8c457d/
PATCHhttps://www.exploit-db.com/exploits/45547/
PATCHhttps://dumpco.re/blog/net-snmp-5.7.3-remote-dos
PATCHhttps://sourceforge.net/p/net-snmp/code/ci/7ffb8e25a0db851953155de91f0170e9bf8c457d/
PATCHhttps://www.exploit-db.com/exploits/45547/
ADVISORYhttp://www.securityfocus.com/bid/106265
ADVISORYhttps://security.netapp.com/advisory/ntap-20181107-0001/
ADVISORYhttps://usn.ubuntu.com/3792-1/
ADVISORYhttps://usn.ubuntu.com/3792-2/
ADVISORYhttps://usn.ubuntu.com/3792-3/
ADVISORYhttps://www.debian.org/security/2018/dsa-4314
ADVISORYhttp://www.securityfocus.com/bid/106265
ADVISORYhttps://security.netapp.com/advisory/ntap-20181107-0001/
ADVISORYhttps://usn.ubuntu.com/3792-1/
ADVISORYhttps://usn.ubuntu.com/3792-2/
ADVISORYhttps://usn.ubuntu.com/3792-3/
ADVISORYhttps://www.debian.org/security/2018/dsa-4314

All References (24)

→
http://www.securityfocus.com/bid/106265Third Party Advisory · VDB Entry
→
https://cert-portal.siemens.com/productcert/pdf/ssa-978220.pdf
→
https://dumpco.re/blog/net-snmp-5.7.3-remote-dosExploit · Patch · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20181107-0001/Third Party Advisory
→
https://security.paloaltonetworks.com/CVE-2018-18065
→
https://sourceforge.net/p/net-snmp/code/ci/7ffb8e25a0db851953155de91f0170e9bf8c457d/Patch · Third Party Advisory
→
https://usn.ubuntu.com/3792-1/Third Party Advisory
→
https://usn.ubuntu.com/3792-2/Third Party Advisory
→
https://usn.ubuntu.com/3792-3/Third Party Advisory
→
https://www.debian.org/security/2018/dsa-4314Third Party Advisory
→
https://www.exploit-db.com/exploits/45547/Exploit · Patch · Third Party Advisory · VDB Entry
→
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
→
http://www.securityfocus.com/bid/106265Third Party Advisory · VDB Entry
→
https://cert-portal.siemens.com/productcert/pdf/ssa-978220.pdf
→
https://dumpco.re/blog/net-snmp-5.7.3-remote-dosExploit · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2018-18065
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-476
CISA KEVNo
ExploitPOC
Affected5 vendor(s)
PublishedOct 8, 2018

Related CVEs (CWE-476)

CVE-2010-2495
10.0
CVE-2022-36648
10.0
CVE-2023-31129
9.8
CVE-2023-48697
9.8
CVE-2021-4236
9.8
CVE-2022-0582
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-18065 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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