Linux Foundation Xen 4.4.0 Xen Tools 64-bit ARM Guest Kernel input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Foundation Xen 4.4.0. Impacted is an unknown function of the component Xen Tools. Such manipulation as part of 64-bit ARM Guest Kernel leads to input validation. This vulnerability is listed as CVE-2014-3716. There is no available exploit. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Linux Foundation Xen 4.4.0 (Virtualization Software). It has been rated as critical. Affected by this issue is an unknown functionality of the component Xen Tools. The manipulation as part of a 64-bit ARM Guest Kernel leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Xen 4.4.x does not properly check alignment, which allows local users to cause a denial of service (crash) via an unspecified field in a DTB header in a 32-bit guest kernel.

The weakness was presented 05/14/2014 by Thomas Leonard as XSA-95 as confirmed advisory (Website). The advisory is available at xenbits.xenproject.org. This vulnerability is handled as CVE-2014-3716 since 05/14/2014. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The advisory points out:

When loading a 64-bit ARM guest kernel the tools similarly did not fully validate the requested load addresses, possibly leading to an overrun on the input buffer when loading the kernel into guest RAM (CVE-2014-3717).

Applying the patch xsa95.patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xenproject.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (93152), SecurityFocus (BID 67388†), SecurityTracker (ID 1030252†) and Vulnerability Center (SBV-44568†). openwall.com is providing further details. See VDB-13235, VDB-13236, VDB-13237 and VDB-69740 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: xsa95.patch

Timelineinfo

05/14/2014 🔍
05/14/2014 +0 days 🔍
05/14/2014 +0 days 🔍
05/14/2014 +0 days 🔍
05/14/2014 +0 days 🔍
05/16/2014 +2 days 🔍
05/17/2014 +1 days 🔍
05/19/2014 +2 days 🔍
05/20/2014 +1 days 🔍
05/28/2017 +1104 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-95
Researcher: Thomas Leonard
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3716 (🔍)
GCVE (CVE): GCVE-0-2014-3716
GCVE (VulDB): GCVE-100-13238
X-Force: 93152 - Xen load addresses denial of service, Medium Risk
SecurityFocus: 67388 - Xen Loading Guest Kernel Multiple Denial of Service Vulnerabilities
SecurityTracker: 1030252 - Xen ARM Guest Loading Bugs Let Local Users Deny Service
Vulnerability Center: 44568 - Xen 4.4.x Local Denial of Service Vulnerability, Low

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 05/17/2014 11:43
Updated: 05/28/2017 03:23
Changes: 05/17/2014 11:43 (74), 05/28/2017 03:23 (5)
Complete: 🔍
Cache ID: 216:78F:103

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