NULL Pointer Dereference Affecting net-snmp package, versions <5.7.3+dfsg-1.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN14-NETSNMP-11761708
- published10 Aug 2025
- disclosed8 Oct 2018
Introduced: 8 Oct 2018
CVE-2018-18066 (opens in a new tab)How to fix?
Upgrade Debian:14 net-snmp to version 5.7.3+dfsg-1.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream net-snmp package and not the net-snmp package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2018-18066
- https://dumpco.re/blog/net-snmp-5.7.3-remote-dos
- https://sourceforge.net/p/net-snmp/code/ci/7ffb8e25a0db851953155de91f0170e9bf8c457d/
- https://sourceforge.net/p/net-snmp/code/ci/f23bcd3ac6ddee5d0a48f9703007ccc738914791/
- https://security.netapp.com/advisory/ntap-20181107-0001/
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html