CVE-2018-18066: net-snmp NULL Pointer Dereference
CVSS: 7.5v3.1HighModified
AliasesRHSA-2020:1081RHSA-2020:2539UBUNTU-CVE-2018-18066DEBIAN-CVE-2018-18066
Published 08-10-2018Last modified 06-05-2025
Vulnerability summary
CVE-2018-18066 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in net-snmp. EPSS estimates a 3.59% chance of exploitation in the next 30 days, higher than 89.2% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
3.59%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 08-10-2018PublishedVulnerability first disclosed.
- 06-05-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
8 scores · 5 sources · 3 versionsHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
High 7.5Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · Red hatEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
3.59%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
0.00 pp
From 3.59% on 18-09-2026
18-09-202618-10-2026
EPSS score3.59%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (dumpco.re)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Redhat10 products
- net-snmp< 1:5.7.2-47.el7 | < 1:5.7.2-43.el7_7.6
- net-snmp-agent-libs< 1:5.7.2-47.el7 | < 1:5.7.2-43.el7_7.6
- net-snmp-debuginfo< 1:5.7.2-47.el7 | < 1:5.7.2-43.el7_7.6
- net-snmp-devel< 1:5.7.2-47.el7 | < 1:5.7.2-43.el7_7.6
- net-snmp-gui< 1:5.7.2-47.el7 | < 1:5.7.2-43.el7_7.6
Netapp6 products
- cloud_backupna
- data_ontapna
- e-series_santricity_os_controller≥ 11.0, ≤ 11.5
- hyper_converged_infrastructurena
- solidfire_element_osna
Debian1 product
- net-snmp< 5.7.3+dfsg-1.1
Net-snmp1 product
- net-snmp< 5.8
Ubuntu1 product
- net-snmp< 5.7.2~dfsg-8.1ubuntu3.1 | < 5.7.3+dfsg-1.8ubuntu3
5 vendors · 19 products
References
25 links- sourceforge.net/p/net-snmp/code/ci/7ffb8e25a0db851953155de91f0170e9bf8c457d/X Refsource MISCPatchThird Party Advisory
- sourceforge.net/p/net-snmp/code/ci/f23bcd3ac6ddee5d0a48f9703007ccc738914791/X Refsource MISCPatchThird Party Advisory
