Linux Foundation Xen 4.4.0 Xen Tools DTB Kernel memory corruption

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

Summaryinfo

A vulnerability was found in Linux Foundation Xen 4.4.0. It has been declared as critical. This vulnerability affects unknown code of the component Xen Tools. The manipulation as part of DTB Kernel results in memory corruption. This vulnerability is identified as CVE-2014-3715. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Linux Foundation Xen 4.4.0 (Virtualization Software). It has been classified as critical. Affected is some unknown processing of the component Xen Tools. The manipulation as part of a DTB Kernel leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in Xen 4.4.x allows local users to read system memory or cause a denial of service (crash) via a crafted 32-bit guest kernel, related to searching for an appended DTB.

The weakness was released 05/14/2014 by Thomas Leonard as XSA-95 as confirmed advisory (Website). The advisory is shared for download at xenbits.xenproject.org. This vulnerability is traded as CVE-2014-3715 since 05/14/2014. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The advisory points out:

Furthermore when checking a 32-bit guest kernel for an appended DTB, the Xen tools were prone to additional overruns also leading to an overrun on the input buffer when loading the kernel into guest RAM

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 (93150), SecurityFocus (BID 67388†), SecurityTracker (ID 1030252†) and Vulnerability Center (SBV-44569†). Further details are available at openwall.com. Entries connected to this vulnerability are available at VDB-13235, VDB-13237, VDB-13238 and VDB-69740. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.2info

CVSSv4info

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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: Memory corruption
CWE: CWE-119
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: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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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-2014-3715 (🔍)
GCVE (CVE): GCVE-0-2014-3715
GCVE (VulDB): GCVE-100-13236
X-Force: 93150 - Xen DTB 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: 44569 - Xen 4.4.x Local File System Read and DoS Related to Searching for an Appended DTB, Low

Misc.: 🔍
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Entryinfo

Created: 05/17/2014 11:36
Updated: 05/28/2017 03:24
Changes: 05/17/2014 11:36 (72), 05/28/2017 03:24 (7)
Complete: 🔍
Cache ID: 216:6C6:103

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