Bug 1448438 (CVE-2017-7995) - CVE-2017-7995 xen: Checks access permissions to MMIO ranges only after accessing them
Summary: CVE-2017-7995 xen: Checks access permissions to MMIO ranges only after access...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2017-7995
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-05-05 12:20 UTC by Andrej Nemec
Modified: 2019-09-29 14:11 UTC (History)
12 users (show)

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Last Closed: 2017-05-05 12:21:34 UTC


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Description Andrej Nemec 2017-05-05 12:20:54 UTC
Xen PV guest before Xen 4.3 checked access permissions to MMIO ranges
only after accessing them, allowing host PCI device space memory reads,
leading to information disclosure. This is an error in the get_user
function. NOTE: the upstream Xen Project considers versions before
4.5.x to be EOL.

References:

https://bugzilla.suse.com/show_bug.cgi?id=1033948


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