Bug 524124 - (CVE-2009-3290) CVE-2009-3290 kernel: KVM: x86: Disallow hypercalls for guest callers in rings > 0
CVE-2009-3290 kernel: KVM: x86: Disallow hypercalls for guest callers in ring...
Status: CLOSED ERRATA
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,source=kvm,public=20...
: Security
Depends On: 524125 524126 531657 545646
Blocks:
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Reported: 2009-09-17 20:16 EDT by Eugene Teo (Security Response)
Modified: 2013-08-27 16:43 EDT (History)
9 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-04-04 17:53:02 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Eugene Teo (Security Response) 2009-09-17 20:16:37 EDT
Description of problem:
Unprivileged guest callers running in ring 3 can issue, e.g., MMU hypercalls. Normally, such callers cannot provide any hand-crafted MMU command structure as it has to be passed by its physical address, but they can still crash the guest kernel by passing random addresses or access the guest kernel memory, etc. This patch considers hypercalls valid only if issued from guest ring 0.

Upstream commit:
http://git.kernel.org/linus/07708c4af1346ab1521b26a202f438366b7bcffd

CVE request:
http://article.gmane.org/gmane.comp.security.oss.general/2130
http://permalink.gmane.org/gmane.comp.security.oss.general/2138

Ref: http://patchwork.kernel.org/patch/38926/
Comment 4 lihuang 2009-09-22 12:45:25 EDT
Reproduce in kvm-83-105.el5_4.3

Verified in kvm-83-105.el5_4.5
Comment 6 errata-xmlrpc 2009-09-29 11:02:52 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2009:1465 https://rhn.redhat.com/errata/RHSA-2009-1465.html
Comment 7 Fedora Update System 2009-10-02 07:00:10 EDT
kernel-2.6.27.35-170.2.94.fc10 has been submitted as an update for Fedora 10.
http://admin.fedoraproject.org/updates/kernel-2.6.27.35-170.2.94.fc10
Comment 8 Fedora Update System 2009-10-03 14:55:48 EDT
kernel-2.6.27.35-170.2.94.fc10 has been pushed to the Fedora 10 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 9 Fedora Update System 2009-10-17 21:57:08 EDT
kernel-2.6.30.9-90.fc11 has been submitted as an update for Fedora 11.
http://admin.fedoraproject.org/updates/kernel-2.6.30.9-90.fc11
Comment 10 Fedora Update System 2009-10-27 02:47:07 EDT
kernel-2.6.30.9-90.fc11 has been pushed to the Fedora 11 stable repository.  If problems still persist, please make note of it in this bug report.

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