Vulnerability Name:

CVE-2019-20892 (CCN-185745)

Assigned:2019-02-14
Published:2019-02-14
Updated:2022-09-02
Summary: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 v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.5 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-415
CWE-416
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-20892

Source: MLIST
Type: Exploit, Mailing List, Third Party Advisory
[oss-security] 20200625 [cve-request@...re.org: Re: [scr916814] net-snmp - Perhaps only unreleased development versions; fix appears to be in v5.8.1.pre1]

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1663027

Source: XF
Type: UNKNOWN
netsnmp-cve201920892-dos(185745)

Source: CCN
Type: net-snmp GIT Repository
libsnmp, USM: Introduce a reference count in struct usmStateReference

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9

Source: GENTOO
Type: Third Party Advisory
GLSA-202008-12

Source: CCN
Type: SourceForge net-snmp Projec Web site
#2923 5.8.0: linux seeing snmpd snmpusb.c:usm_rgenerate_out_msg() core dump with double free error

Source: MISC
Type: Exploit, Third Party Advisory
https://sourceforge.net/p/net-snmp/bugs/2923/

Source: UBUNTU
Type: Third Party Advisory
USN-4410-1

Source: MISC
Type: Patch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.html

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-20892

Vulnerable Configuration:Configuration 1:
  • cpe:/a:net-snmp:net-snmp:*:*:*:*:*:*:*:* (Version <= 5.8)

    • Configuration 2:
  • cpe:/a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:8::baseos:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:net-snmp:net-snmp:5.8:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.redhat.rhba:def:20201376
    P
    		RHBA-2020:1376: net-snmp bug fix and enhancement update (Moderate)
    2020-04-07
    BACK
    net-snmp net-snmp *
    oracle zfs storage appliance kit 8.8
    net-snmp net-snmp 5.8