Linux Kernel up to 3.11.7 Nested INVEPT input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 3.11.7. Affected is an unknown function of the component Nested INVEPT Handler. Performing a manipulation results in input validation. This vulnerability is reported as CVE-2014-3645. No exploit exists. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 3.11.7 (Operating System). This affects some unknown processing of the component Nested INVEPT Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. The summary by CVE is:

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.12 does not have an exit handler for the INVEPT instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application.

The weakness was disclosed 10/24/2014 with Intel Advanced Threat Research Team as confirmed bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2014-3645 since 05/14/2014. The exploitability is told to be easy. Attacking locally is a requirement. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The advisory points out:

On systems with invept instruction support (corresponding bit in IA32_VMX_EPT_VPID_CAP MSR is set) guest invocation of invept causes vm exit, which is currently not handled and causes unknown exit error to be propagated to userspace.

The vulnerability scanner Nessus provides a plugin with the ID 78702 (CentOS 7 : kernel (CESA-2014:1724)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115151 (Red Hat Update for kernel (RHSA-2015:0284)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the databases at X-Force (97772), Tenable (78702), SecurityFocus (BID 70746†), SecurityTracker (ID 1031201†) and Vulnerability Center (SBV-47111†). The entries VDB-68068 and VDB-68069 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Red Hat Linux 5/6/7

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.4

VulDB Base Score: 6.2
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 78702
Nessus Name: CentOS 7 : kernel (CESA-2014:1724)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703060
OpenVAS Name: Debian Security Advisory DSA 3060-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: bfd0a56b90005f8c8a004baf407ad90045c2b11e

Timelineinfo

05/14/2014 🔍
10/24/2014 +163 days 🔍
10/24/2014 +0 days 🔍
10/27/2014 +3 days 🔍
10/28/2014 +1 days 🔍
11/10/2014 +13 days 🔍
11/12/2014 +2 days 🔍
11/17/2014 +5 days 🔍
02/23/2022 +2655 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2014:1724
Organization: Intel Advanced Threat Research Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3645 (🔍)
GCVE (CVE): GCVE-0-2014-3645
GCVE (VulDB): GCVE-100-68067

OVAL: 🔍

X-Force: 97772 - Linux Kernel support denial of service, Medium Risk
SecurityFocus: 70746 - Linux Kernel KVM CVE-2014-3645 Denial of Service Vulnerability
SecurityTracker: 1031201 - Linux Kernel KVM INVEPT Processing Flaw Lets Local Guest Users Deny Service on the Host System
Vulnerability Center: 47111 - Linux Kernel Prior to 3.12 KVM Subsystem Local DoS Vulnerability via a Crafted Application, Low

See also: 🔍

Entryinfo

Created: 10/28/2014 14:53
Updated: 02/23/2022 18:45
Changes: 10/28/2014 14:53 (85), 06/12/2017 08:22 (1), 02/23/2022 18:30 (3), 02/23/2022 18:37 (1), 02/23/2022 18:45 (2)
Complete: 🔍
Cache ID: 216:329:103

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