Bug 1487251 – CVE-2017-1000200 tcmu-runner: UnregisterHandler D-Bus method in tcmu-runner daemon for internal handler causes DoS

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Bug 1487251 - (CVE-2017-1000200) CVE-2017-1000200 tcmu-runner: UnregisterHandler D-Bus method in tcmu-runner daemon for internal handler causes DoS

Summary:	CVE-2017-1000200 tcmu-runner: UnregisterHandler D-Bus method in tcmu-runner d...

Status:	NEW

Aliases:	CVE-2017-1000200

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20170714,repor...
Keywords:	Security

Depends On:	1487255 1494514 1494511
Blocks:	1487254
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Reported:	2017-08-31 09:45 EDT by Andrej Nemec
Modified:	2017-11-28 22:33 EST (History)
CC List:	7 users (show)

See Also:
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:	A NULL pointer dereference flaw was found in the UnregisterHandler method implemented in the tcmu-runner daemon. A local, non-root user with access to the D-Bus system bus could call the UnregisterHandler method with the name of a handler loaded internally in tcmu-runner via dlopen() to trigger DoS.
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Last Closed:
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Regression:	---
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2017:3277	normal	SHIPPED_LIVE	Moderate: tcmu-runner security update	2017-11-29 03:32:51 EST

Groups: None (edit)

Description Andrej Nemec 2017-08-31 09:45:34 EDT

A local non-root user with access to the D-Bus system bus can call the
UnregisterHandler method implemented in the tcmu-runner daemon with the
name of a handler loaded internally in tcmu-runner via dlopen() and
cause a NULL pointer dereference resulting in DoS.

Upstream patch:

https://github.com/open-iscsi/tcmu-runner/commit/bb80e9c7a798f035768260ebdadffb6eb0786178

References:

http://seclists.org/oss-sec/2017/q3/207

Comment 1 Andrej Nemec 2017-08-31 09:50:00 EDT

Created tcmu-runner tracking bugs for this issue:

Affects: fedora-all [bug 1487255]

Comment 4 errata-xmlrpc 2017-11-28 22:33:41 EST

This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.3 for RHEL 7

Via RHSA-2017:3277 https://access.redhat.com/errata/RHSA-2017:3277

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