Bug 1033138 - (CVE-2013-6375) CVE-2013-6375 xen: Insufficient TLB flushing in VT-d (iommu) code
CVE-2013-6375 xen: Insufficient TLB flushing in VT-d (iommu) code
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20131120,repo...
: Security
Depends On: 1033149
Blocks: 1033150
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Reported: 2013-11-21 10:37 EST by Petr Matousek
Modified: 2015-02-16 10:45 EST (History)
18 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-11-21 10:41:32 EST
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Description Petr Matousek 2013-11-21 10:37:58 EST
An inverted boolean parameter resulted in TLB flushes not happening upon clearing of a present translation table entry.  Retaining stale TLB entries could allow guests access to memory that ought to have
been revoked, or grant greater access than intended.

Malicious guest administrators might be able to cause host-wide denial of service, or escalate their privilege to that of the host.

References:
http://seclists.org/oss-sec/2013/q4/322

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.
Comment 1 Petr Matousek 2013-11-21 10:41:32 EST
Statement:

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.

This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.
Comment 2 Petr Matousek 2013-11-21 10:46:57 EST
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1033149]

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