Bug 1528396 (CVE-2018-5748)

Summary: CVE-2018-5748 libvirt: Resource exhaustion via qemuMonitorIORead() method
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: agedosier, berrange, clalancette, eblake, itamar, jdenemar, jforbes, jsuchane, knoel, laine, libvirt-maint, pkrempa, security-response-team, sisharma, smohan, ssaha, vbellur, veillard
Target Milestone: ---Keywords: Reopened, Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2018-10-24 08:58:14 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 1535785, 1550979, 1550980, 1566978    
Bug Blocks: 1528397    

Description Pedro Sampaio 2017-12-21 18:34:15 UTC 
A flaw was found in Qemu. A lack of restriction for the amount of data read by QEMU Monitor socket can lead to denial of service by exhaustion of memory resources.

References:

https://www.redhat.com/archives/libvir-list/2017-December/msg00749.html
Comment 1 Pedro Sampaio 2017-12-21 18:34:29 UTC 
Acknowledgments:

Name: Daniel P. Berrange (Red Hat), Peter Krempa (Red Hat)
Comment 2 Prasad Pandit 2018-01-18 06:05:43 UTC 
Created libvirt tracking bugs for this issue:

Affects: fedora-all [bug 1535785]
Comment 3 Cedric Buissart 2018-01-24 14:36:48 UTC 
Although RHES-3 (RHGS) is shipped with libvirt, it does not use Qemu. As such, there is no qemu process running, and no vulnerable monitor socket created.
Comment 4 Fedora Update System 2018-03-01 16:23:28 UTC 
libvirt-3.7.0-4.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.
Comment 6 errata-xmlrpc 2018-05-14 16:11:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:1396 https://access.redhat.com/errata/RHSA-2018:1396
Comment 7 errata-xmlrpc 2018-06-19 04:55:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1929 https://access.redhat.com/errata/RHSA-2018:1929