Vulnerability Details : CVE-2019-20892
Potential exploit
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2019-20892
- cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*
- cpe:2.3:a:net-snmp:net-snmp:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-20892
0.30%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 51 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-20892
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:N/AC:L/Au:S/C:N/I:N/A:P |
8.0
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2019-20892
-
The product calls free() twice on the same memory address.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-20892
-
https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027
Bug #1877027 " SNMP stopped running all of sudden (snmpd 5.8+dfs... : Bugs : net-snmp package : UbuntuExploit;Issue Tracking;Third Party Advisory
-
https://security.gentoo.org/glsa/202008-12
Net-SNMP: Multiple vulnerabilities (GLSA 202008-12) — Gentoo securityThird Party Advisory
-
https://sourceforge.net/p/net-snmp/bugs/2923/
net-snmp / Bugs / #2923 5.8.0: linux seeing snmpd snmpusb.c:usm_rgenerate_out_msg() core dump with double free errorExploit;Third Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=1663027
1663027 – net-snmpd double free or corruption errorExploit;Issue Tracking;Third Party Advisory
-
https://www.oracle.com/security-alerts/cpujan2021.html
Oracle Critical Patch Update Advisory - January 2021Patch;Third Party Advisory
-
https://usn.ubuntu.com/4410-1/
USN-4410-1: Net-SNMP vulnerability | Ubuntu security notices | UbuntuThird Party Advisory
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https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9
libsnmp, USM: Introduce a reference count in struct usmStateReference · net-snmp/net-snmp@5f881d3 · GitHubPatch;Third Party Advisory
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http://www.openwall.com/lists/oss-security/2020/06/25/4
oss-security - [cve-request@...re.org: Re: [scr916814] net-snmp - Perhaps only unreleased development versions; fix appears to be in v5.8.1.pre1]Exploit;Mailing List;Third Party Advisory
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