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TI-2018-12840 Aliases CVE-2018-18066GHSA-9mpr-24m6-767p

snmp_oid_compare in snmplib/snmp_api.c in Net-SNMP before 5.8 has a NULL Pointer…

Priority HIGH 72CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 12 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0359 89th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 12 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:net-snmp:net-snmp:*:*:*:*:*:*:*:*before 5.8Vulnerablenet-snmp
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:hyper_converged_infrastructure:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:storagegrid_webscale:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:netapp:data_ontap:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*11.0 – 11.5VulnerableNetApp
cpe:2.3:o:netapp:solidfire_element_os:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
  • cpe:2.3:a:net-snmp:net-snmp:*:*:*:*:*:*:*:* Versions before 5.8 Vulnerable ·net-snmp
  • cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:hyper_converged_infrastructure:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:storagegrid_webscale:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:netapp:data_ontap:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* Versions 11.0 – 11.5 Vulnerable ·NetApp
  • cpe:2.3:o:netapp:solidfire_element_os:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp

Remediation

Red Hat 2 advisories

  • RHSA-2020:2539 Released 2020-06-12 · Red Hat rating Moderate
    net-snmp security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) net-snmp-1:5.7.2-43.el7_7.6, net-snmp-agent-libs-1:5.7.2-43.el7_7.6, net-snmp-libs-1:5.7.2-43.el7_7.6 +1
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) net-snmp-devel-1:5.7.2-43.el7_7.6, net-snmp-gui-1:5.7.2-43.el7_7.6, net-snmp-perl-1:5.7.2-43.el7_7.6 +2
    • Red Hat Enterprise Linux Server EUS (v. 7.7) net-snmp-1:5.7.2-43.el7_7.6, net-snmp-agent-libs-1:5.7.2-43.el7_7.6, net-snmp-agent-libs-1:5.7.2-43.el7_7.6.ppc +5
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) net-snmp-gui-1:5.7.2-43.el7_7.6, net-snmp-perl-1:5.7.2-43.el7_7.6, net-snmp-python-1:5.7.2-43.el7_7.6 +1
  • RHSA-2020:1081 Released 2020-03-31 · Red Hat rating Moderate
    net-snmp security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) net-snmp-1:5.7.2-47.el7, net-snmp-agent-libs-1:5.7.2-47.el7, net-snmp-libs-1:5.7.2-47.el7 +1
    • Red Hat Enterprise Linux Client Optional (v. 7) net-snmp-devel-1:5.7.2-47.el7, net-snmp-gui-1:5.7.2-47.el7, net-snmp-perl-1:5.7.2-47.el7 +2
    • Red Hat Enterprise Linux ComputeNode (v. 7) net-snmp-1:5.7.2-47.el7, net-snmp-agent-libs-1:5.7.2-47.el7, net-snmp-libs-1:5.7.2-47.el7 +1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) net-snmp-devel-1:5.7.2-47.el7, net-snmp-gui-1:5.7.2-47.el7, net-snmp-perl-1:5.7.2-47.el7 +2
    • Red Hat Enterprise Linux Server (v. 7) net-snmp-1:5.7.2-47.el7, net-snmp-agent-libs-1:5.7.2-47.el7, net-snmp-agent-libs-1:5.7.2-47.el7.ppc +5
    • Red Hat Enterprise Linux Server Optional (v. 7) net-snmp-gui-1:5.7.2-47.el7, net-snmp-perl-1:5.7.2-47.el7, net-snmp-python-1:5.7.2-47.el7 +1
    • Red Hat Enterprise Linux Workstation (v. 7) net-snmp-1:5.7.2-47.el7, net-snmp-agent-libs-1:5.7.2-47.el7, net-snmp-devel-1:5.7.2-47.el7 +2
    • Red Hat Enterprise Linux Workstation Optional (v. 7) net-snmp-gui-1:5.7.2-47.el7, net-snmp-perl-1:5.7.2-47.el7, net-snmp-python-1:5.7.2-47.el7 +1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:1081
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:1081
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2020:1081
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2020:2539
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:1081
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2020:2539
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:1081
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2020:2539
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:1081
Red Hat Enterprise Linux Server Optional EUS (v. 7.7)Fixed RHSA-2020:2539
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:1081
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:1081
Not affected: 2 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-18066
  2. 2026-10-03 Alias added: GHSA-9mpr-24m6-767p

References

Exploit 1

Patch 2

Advisory 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences