Input validation error in Linux kernel

1) Input validation error

EUVDB-ID: #VU41138

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-8369

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.0 - 3.17.1

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:3.0.68:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.1.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.2.30:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.3.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.4.79:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.5.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.6.11:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.7.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.8.13:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.9.11:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.10.29:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.11.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.12.17:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.13.11:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.14.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.15.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.16.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.17.1:*:*:*:*:*:*:*

External links

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3d32e4dbe71374a6780eaf51d719d76f9a9bf22f
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
http://rhn.redhat.com/errata/RHSA-2015-0674.html
http://secunia.com/advisories/62326
http://secunia.com/advisories/62336
http://www.debian.org/security/2014/dsa-3093
http://www.openwall.com/lists/oss-security/2014/10/24/7
http://www.securityfocus.com/bid/70747
http://www.securityfocus.com/bid/70749
http://bugzilla.redhat.com/show_bug.cgi?id=1156518
http://github.com/torvalds/linux/commit/3d32e4dbe71374a6780eaf51d719d76f9a9bf22f
http://lkml.org/lkml/2014/10/24/460

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.