Bug 1911496 (CVE-2020-35766)

Summary:	CVE-2020-35766 opendkim: allows local users to gain privileges via a symlink attack against the /tmp/testkeys file
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anon.amish, matt, tkorbar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2020-12-30 00:27:38 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1911498, 1911497
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2020-12-29 19:21:10 UTC

The test suite in libopendkim in OpenDKIM through 2.10.3 allows local users to gain privileges via a symlink attack against the /tmp/testkeys file (related to t-testdata.h, t-setup.c, and t-cleanup.c). NOTE: this is applicable to persons who choose to engage in the "A number of self-test programs are included here for unit-testing the library" situation.

https://github.com/trusteddomainproject/OpenDKIM/issues/113

Comment 1 Guilherme de Almeida Suckevicz 2020-12-29 19:21:27 UTC

Created opendkim tracking bugs for this issue:

Affects: epel-all [bug 1911498]
Affects: fedora-all [bug 1911497]

Comment 2 Product Security DevOps Team 2020-12-30 00:27:38 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.