MEDIUM
CVE-2019-20892
CWE-415Published: June 25, 2020· Updated: Jun 17, 2026
6.5
CVSS v3.1
Official Description
net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c via an SNMPv3 GetBulk request. NOTE: this affects net-snmp packages shipped to end users by multiple Linux distributions, but might not affect an upstream release.
Technical Analysis
CVE-2019-20892 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.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
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
ADVISORYhttps://usn.ubuntu.com/4410-1/
ADVISORYhttps://usn.ubuntu.com/4410-1/
All References (16)
→
http://www.openwall.com/lists/oss-security/2020/06/25/4Exploit · Mailing List · Third Party Advisory
→
https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027Exploit · Issue Tracking · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1663027Exploit · Issue Tracking · Third Party Advisory
→
https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9Patch · Third Party Advisory
→
https://security.gentoo.org/glsa/202008-12Third Party Advisory
→
https://sourceforge.net/p/net-snmp/bugs/2923/Exploit · Third Party Advisory
→
https://usn.ubuntu.com/4410-1/Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujan2021.htmlPatch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2020/06/25/4Exploit · Mailing List · Third Party Advisory
→
https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027Exploit · Issue Tracking · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1663027Exploit · Issue Tracking · Third Party Advisory
→
https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9Patch · Third Party Advisory
→
https://security.gentoo.org/glsa/202008-12Third Party Advisory
→
https://sourceforge.net/p/net-snmp/bugs/2923/Exploit · Third Party Advisory
→
https://usn.ubuntu.com/4410-1/Third Party Advisory
Quick Facts
CVE IDCVE-2019-20892
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-415
CISA KEVNo
Affected2 vendor(s)
PublishedJun 25, 2020
Related CVEs (CWE-415)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-20892 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.