Vulnerability CVE-2014-8369
Published: 2014-11-10

Description:
The kvm_iommu_map_pages function in virt/kvm/iommu.c in the Linux kernel through 3.17.2 miscalculates the number of pages during the handling of a mapping failure, which allows guest OS users to cause a denial of service (host OS page unpinning) or possibly have unspecified other impact by leveraging guest OS privileges. NOTE: this vulnerability exists because of an incorrect fix for CVE-2014-3601.

See advisories in our WLB2 database:
Topic
Author
Date
High
Linux Kernel iommu.c excessive unpinning
Paolo
25.10.2014

CVSS2 => (AV:L/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.6/10
6.4/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Linux -> Linux kernel 

 References:
https://lkml.org/lkml/2014/10/24/460
https://github.com/torvalds/linux/commit/3d32e4dbe71374a6780eaf51d719d76f9a9bf22f
https://bugzilla.redhat.com/show_bug.cgi?id=1156518
http://www.securityfocus.com/bid/70749
http://www.securityfocus.com/bid/70747
http://www.openwall.com/lists/oss-security/2014/10/24/7
http://www.debian.org/security/2014/dsa-3093
http://rhn.redhat.com/errata/RHSA-2015-0674.html
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3d32e4dbe71374a6780eaf51d719d76f9a9bf22f
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