Linux Foundation Xen 4.4.0 Xen Tools DTB Header input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Foundation Xen 4.4.0. It has been rated as problematic. This issue affects some unknown processing of the component Xen Tools. This manipulation as part of DTB Header causes input validation. This vulnerability is tracked as CVE-2014-3716. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Linux Foundation Xen 4.4.0 (Virtualization Software). It has been declared as problematic. Affected by this vulnerability is an unknown function of the component Xen Tools. The manipulation as part of a DTB Header leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

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 disclosed 05/14/2014 by Thomas Leonard as XSA-95 as confirmed advisory (Website). The advisory is shared at xenbits.xenproject.org. This vulnerability is known as CVE-2014-3716 since 05/14/2014. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The advisory points out:

Also, the tools would access a field in the putative DTB header without checking for its alignment

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 (93151), SecurityFocus (BID 67388†) and SecurityTracker (ID 1030252†). Additional details are provided at openwall.com. The entries VDB-13235, VDB-13236, VDB-13238 and VDB-69740 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

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 🔍
05/17/2014 +3 days 🔍
05/19/2014 +2 days 🔍
05/17/2018 +1459 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-100-13237
X-Force: 93151 - Xen DTB header denial of service, Medium Risk
SecurityFocus: 67388 - Xen Loading Guest Kernel Multiple Denial of Service Vulnerabilities
SecurityTracker: 1030252

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 05/17/2014 11:41
Updated: 05/17/2018 08:55
Changes: 05/17/2014 11:41 (62), 05/17/2018 08:55 (6)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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