Linux Foundation Xen up to 4.5.0 Emulation Routine information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.5$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Foundation Xen. Affected by this issue is some unknown functionality of the component Emulation Routine. The manipulation leads to information disclosure. This vulnerability is uniquely identified as CVE-2015-2044. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Foundation Xen (Virtualization Software). This issue affects some unknown processing of the component Emulation Routine. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

The emulation routines for unspecified X86 devices in Xen 3.2.x through 4.5.x does not properly initialize data, which allow local HVM guest users to obtain sensitive information via vectors involving an unsupported access size.

The weakness was disclosed 03/05/2015 by Felix Wilhelm with ERNW as XSA-121 as confirmed advisory (Website). The advisory is shared at xenbits.xen.org. The identification of this vulnerability is CVE-2015-2044 since 02/20/2015. The exploitation is known to be easy. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 81694 (OracleVM 3.3 : xen (OVMSA-2015-0026)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family OracleVM Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167942 (OpenSuSE Security Update for xen (openSUSE-SU-2015:1092-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (101340), Tenable (81694), SecurityFocus (BID 73015†), SecurityTracker (ID 1031836†) and Vulnerability Center (SBV-49261†). The entries VDB-69256, VDB-73930, VDB-73994 and VDB-74496 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: 4.0
VulDB Meta Temp Score: 3.5

VulDB Base Score: 4.0
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: 81694
Nessus Name: OracleVM 3.3 : xen (OVMSA-2015-0026)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 703181
OpenVAS Name: Debian Security Advisory DSA 3181-1 (xen - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

02/20/2015 🔍
03/05/2015 +13 days 🔍
03/05/2015 +0 days 🔍
03/05/2015 +0 days 🔍
03/05/2015 +0 days 🔍
03/06/2015 +1 days 🔍
03/09/2015 +3 days 🔍
03/10/2015 +1 days 🔍
03/12/2015 +2 days 🔍
03/31/2015 +19 days 🔍
03/11/2022 +2537 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-121
Researcher: Felix Wilhelm
Organization: ERNW
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-2044 (🔍)
GCVE (CVE): GCVE-0-2015-2044
GCVE (VulDB): GCVE-100-69257

OVAL: 🔍

X-Force: 101340 - Xen emulation routines information disclosure
SecurityFocus: 73015 - Xen CVE-2015-2151 Memory Corruption Vulnerability
SecurityTracker: 1031836 - Xen x86 Device Emulation Bug Lets Local Guest Users Obtain Information From Other Guest Systems
Vulnerability Center: 49261 - Xen 3.2.x through 4.5.x Local Information Disclosure due to an Error in the Emulation Routines, Low

See also: 🔍

Entryinfo

Created: 03/06/2015 09:54
Updated: 03/11/2022 01:51
Changes: 03/06/2015 09:54 (76), 06/24/2017 09:22 (10), 03/11/2022 01:51 (3)
Complete: 🔍
Cache ID: 216:963:103

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