What’s Vulnerable › Vulnerabilities

CVE-2018-18066

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-10-08 · updated 2026-06-17
• Weakness: CWE-476

Description

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.

Affected products

• net-snmp: before 5.8 — fixed in 5.8
• NetApp Cloud Backup: all versions
• NetApp Data ONTAP operating in 7-Mode: all versions
• E-Series SANtricity OS Controller Software 11.x: from 11.0 through 11.5
• NetApp Hyper Converged Infrastructure: all versions
• NetApp Solidfire Element Os: all versions
• NetApp StorageGRID Webscale: all versions

How to fix

Upgrade to a fixed version: net-snmp 5.8. Check the vendor advisory for mitigations.

References

• https://dumpco.re/blog/net-snmp-5.7.3-remote-dos
• https://security.netapp.com/advisory/ntap-20181107-0001/
• https://sourceforge.net/p/net-snmp/code/ci/7ffb8e25a0db851953155de91f0170e9bf8c457d/
• https://sourceforge.net/p/net-snmp/code/ci/f23bcd3ac6ddee5d0a48f9703007ccc738914791/
• https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
• https://dumpco.re/blog/net-snmp-5.7.3-remote-dos
• https://security.netapp.com/advisory/ntap-20181107-0001/
• https://sourceforge.net/p/net-snmp/code/ci/7ffb8e25a0db851953155de91f0170e9bf8c457d/
• https://sourceforge.net/p/net-snmp/code/ci/f23bcd3ac6ddee5d0a48f9703007ccc738914791/
• https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

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