net-snmp up to 5.8.0 SNMPv3 GetBulk Request snmplib/snmpusm.c usm_free_usmStateReference double free

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CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

A vulnerability has been found in net-snmp up to 5.8.0 (Network Management Software) and classified as critical. Affected by this vulnerability is the function usm_free_usmStateReference in the library snmplib/snmpusm.c of the component SNMPv3 GetBulk Request Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-415. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was released 06/25/2020 (Website). The advisory is shared at bugs.launchpad.net. This vulnerability is known as CVE-2019-20892 since 06/25/2020. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/26/2020).

Upgrading to version 5.8.1.pre1 eliminates this vulnerability.

Productinfoedit

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Name

CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2infoedit

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

NVD Base Score: 🔒

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-415
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: net-snmp 5.8.1.pre1

Timelineinfoedit

06/25/2020 Advisory disclosed
06/25/2020 +0 days CVE assigned
06/26/2020 +1 days VulDB entry created
06/26/2020 +0 days VulDB last update

Sourcesinfoedit

Advisory: bugs.launchpad.net
Status: Not defined

CVE: CVE-2019-20892 (🔒)

Entryinfoedit

Created: 06/26/2020 09:00 AM
Changes: (18) software_type vulnerability_cwe vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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