Bug 1401024 (CVE-2016-8652)

Summary:	CVE-2016-8652 dovecot: Remote crash when auth-policy component is activated
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	janfrode, mhlavink, pokorra.mailinglists
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	dovecot 2.2.27	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:03:00 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1401025
Bug Blocks:

Description Andrej Nemec 2016-12-02 15:10:41 UTC

If auth-policy component has been activated in Dovecot, then remote user
can use SASL authentication to crash auth component.

Workaround is to disable auth-policy component until fix is in place.
This can be done by commenting out all auth_policy_* settings.

References:

http://seclists.org/oss-sec/2016/q4/564
http://dovecot.org/list/dovecot-news/2016-November/000332.html

Upstream patches:

https://github.com/dovecot/core/commit/1f2c35da2b96905bec6e45f88af0f33ee63789e6
https://github.com/dovecot/core/commit/2c3f37672277b1f73f84722802aaa0ab1ab3e413

Comment 1 Andrej Nemec 2016-12-02 15:11:10 UTC

Created dovecot tracking bugs for this issue:

Affects: fedora-all [bug 1401025]