Bug 1487246 (CVE-2017-1000198)

Summary:	CVE-2017-1000198 tcmu-runner: glfs handler allows local DoS via crafted CheckConfig strings
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	prasanna.kalever, rhs-bugs, sisharma
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the implementation of CheckConfig method in handler_glfs.so of the tcmu-runner daemon. A local, non-root user with access to the D-Bus system bus could send a specially crafted string to CheckConfig method resulting in various kinds of segmentation fault.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-21 11:55:58 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:	1487255, 1494511, 1494514
Bug Blocks:	1487254

Description Andrej Nemec 2017-08-31 13:41:00 UTC

A local non-root user with access to the D-Bus system bus can call the
CheckConfig method implemented in the tcmu-runner daemon via
handler_glfs.so and cause various kinds of segmentation faults,
depending on the string passed to the method.

For example the "hosts" variable in glfs_check_config() is not zero
initialized, but always freed on error, causing invalid free and/or
invalid memory accesses.

Upstream patch:

https://github.com/open-iscsi/tcmu-runner/commit/61bd03e600d2abf309173e9186f4d465bb1b7157

References:

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

Comment 1 Andrej Nemec 2017-08-31 13:50:24 UTC

Created tcmu-runner tracking bugs for this issue:

Affects: fedora-all [bug 1487255]

Comment 4 errata-xmlrpc 2017-11-29 03:33:27 UTC

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