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Bug 1487246 (CVE-2017-1000198) - CVE-2017-1000198 tcmu-runner: glfs handler allows local DoS via crafted CheckConfig strings
Summary: CVE-2017-1000198 tcmu-runner: glfs handler allows local DoS via crafted Check...
Keywords:
Status: NEW
Alias: CVE-2017-1000198
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1487255 1494511 1494514
Blocks: 1487254
TreeView+ depends on / blocked
 
Reported: 2017-08-31 13:41 UTC by Andrej Nemec
Modified: 2020-09-10 21:17 UTC (History)
3 users (show)

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.
Clone Of:
Environment:
Last Closed:


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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:3277 0 normal SHIPPED_LIVE Moderate: tcmu-runner security update 2017-11-29 08:32:51 UTC

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


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