Medium severity · published Jun 25, 2020
CVE-2019-20892
net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c via an SNMPv3 GetBulk request
6.5
CVSS
2.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.3% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
Net-snmp · Net-snmp
through 5.8 · source: NVD
ZS
Zfs Storage Appliance Kit · Oracle
8.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-20892
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-20892
Exploit
http://www.openwall.com/lists/oss-security/2020/06/25/4
Exploit
https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027
Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=1663027
Patch
https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9
Third Party Advisory
https://security.gentoo.org/glsa/202008-12
Exploit
https://sourceforge.net/p/net-snmp/bugs/2923/
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