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Bug 1527112 - (CVE-2017-17741) CVE-2017-17741 kernel: kvm: stack-based out-of-bounds read via vmcall instruction
CVE-2017-17741 kernel: kvm: stack-based out-of-bounds read via vmcall instruc...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20171211,reported=2...
: Security
Depends On: 1527114 1527113
Blocks: 1527116
  Show dependency treegraph
 
Reported: 2017-12-18 10:12 EST by Adam Mariš
Modified: 2018-08-28 18:28 EDT (History)
45 users (show)

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Doc Text:
Linux kernel compiled with the KVM virtualization (CONFIG_KVM) support is vulnerable to an out-of-bounds read access issue. It could occur when emulating vmcall instructions invoked by a guest. A guest user/process could use this flaw to disclose kernel memory bytes.
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Description Adam Mariš 2017-12-18 10:12:49 EST
Linux kernel built with the KVM virtualization(CONFIG_KVM) support is vulnerable
to an out-of-bounds read access issue. It could occur when emulating vmcall instruction invoked by a guest.

A guest user/process could use this flaw to disclose kernel memory bytes.

Upstream patch:
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  -> https://www.spinics.net/lists/kvm/msg160796.html

Reference:
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  -> http://www.openwall.com/lists/oss-security/2017/12/19/2
Comment 1 Adam Mariš 2017-12-18 10:17:20 EST
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1527113]
Comment 5 Vladis Dronov 2018-01-04 12:48:12 EST
Reproducer:
Comment 6 Eric Christensen 2018-01-04 13:27:30 EST
Statement:

This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.

This issue affects the versions of Linux kernel as shipped with Red Hat Enterprise Linux 6 and 7.

This has been rated as having Low 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/.

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