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

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in net-snmp up to 5.8.0. Impacted is the function usm_free_usmStateReference in the library snmplib/snmpusm.c of the component SNMPv3 GetBulk Request Handler. This manipulation causes double free. This vulnerability is handled as CVE-2019-20892. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

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 double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. 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.

Upgrading to version 5.8.1.pre1 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: net-snmp 5.8.1.pre1

Timelineinfo

06/25/2020 🔍
06/25/2020 +0 days 🔍
06/26/2020 +1 days 🔍
06/26/2020 +0 days 🔍

Sourcesinfo

Advisory: bugs.launchpad.net
Status: Not defined

CVE: CVE-2019-20892 (🔍)
GCVE (CVE): GCVE-0-2019-20892
GCVE (VulDB): GCVE-100-157261

Entryinfo

Created: 06/26/2020 09:00
Updated: 06/26/2020 09:05
Changes: 06/26/2020 09:00 (40), 06/26/2020 09:05 (18)
Complete: 🔍
Cache ID: 216::103

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