|Summary:||CVE-2014-7840 qemu: insufficient parameter validation during ram load|
|Product:||[Other] Security Response||Reporter:||Petr Matousek <pmatouse>|
|Component:||vulnerability||Assignee:||Red Hat Product Security <security-response-team>|
|Status:||CLOSED ERRATA||QA Contact:|
|Version:||unspecified||CC:||abaron, amit.shah, apevec, areis, ayoung, berrange, carnil, cfergeau, chrisw, dallan, dwmw2, ehabkost, gkotton, itamar, jrusnack, knoel, lhh, lpeer, markmc, mkenneth, mrezanin, mst, mtosatti, pbonzini, rbryant, rjones, sclewis, scottt.tw, srevivo, stefanha, virt-maint, virt-maint|
|Fixed In Version:||Doc Type:||Bug Fix|
It was found that certain values that were read when loading RAM during migration were not validated. A user able to alter the savevm data (either on the disk or over the wire during migration) could use either of these flaws to corrupt QEMU process memory on the (destination) host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process.
|Last Closed:||2019-06-08 02:36:01 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Bug Depends On:||1163077, 1163078, 1163079, 1163080|
Description Petr Matousek 2014-11-12 10:41:17 UTC
During migration, the values read from migration stream during ram load are not validated. Especially offset in host_from_stream_offset() and also the length of the writes in the callers of the said function. A user able to alter the savevm data (either on the disk or over the wire during migration) could use either of these flaws to corrupt QEMU process memory on the (destination) host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process. Acknowledgements: This issue was discovered by Michael S. Tsirkin of Red Hat.
Comment 1 Petr Matousek 2014-11-12 10:43:06 UTC
Statement: This issue affects the qemu-kvm packages as shipped with Red Hat Enterprise Linux 5, 6 and 7. Future updates for the respective releases may address this issue. Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Comment 2 Petr Matousek 2014-11-12 10:43:50 UTC
Upstream patch submission -- http://thread.gmane.org/gmane.comp.emulators.qemu/306117
Comment 5 Petr Matousek 2014-11-12 10:47:31 UTC
Created qemu tracking bugs for this issue: Affects: fedora-all [bug 1163080]
Comment 6 Petr Matousek 2014-11-20 11:04:05 UTC
Comment 7 Fedora Update System 2014-12-12 04:26:55 UTC
qemu-2.1.2-7.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
Comment 8 Fedora Update System 2014-12-23 18:30:21 UTC
qemu-1.6.2-12.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
Comment 9 errata-xmlrpc 2015-03-05 08:13:52 UTC
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2015:0349 https://rhn.redhat.com/errata/RHSA-2015-0349.html