Bug 1851145 (CVE-2019-20892)

Summary:	CVE-2019-20892 net-snmp: double free in usm_free_usmStateReference function in snmplib/snmpusm.c via an SNMPv3 GetBulk request
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jridky, jsafrane, mhjacks, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
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Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1802055, 1851150, 1882249, 1910626
Bug Blocks:	1851146

Description Guilherme de Almeida Suckevicz 2020-06-25 16:46:10 UTC

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.

References:
https://sourceforge.net/p/net-snmp/bugs/2923/
https://bugzilla.redhat.com/show_bug.cgi?id=1663027

Upstream commit:
https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9

Comment 1 Guilherme de Almeida Suckevicz 2020-06-25 16:47:41 UTC

Created net-snmp tracking bugs for this issue:

Affects: fedora-all [bug 1851150]

Comment 2 Huzaifa S. Sidhpurwala 2020-07-06 04:08:54 UTC

This issue has been addressed in Red Hat Enterprise Linux 8 via:

https://access.redhat.com/errata/RHBA-2020:1376