XenSource Xen 4.2/4.3/4.4/4.5 RTL8139 Device information disclosure

CVSS Meta Temp Score
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3.2$0-$5k0.00

A vulnerability classified as problematic was found in XenSource Xen 4.2/4.3/4.4/4.5 (Virtualization Software). Affected by this vulnerability is an unknown code block of the component RTL8139 Device Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used in Xen 4.5.x and earlier, allows remote attackers to read process heap memory via unspecified vectors.

The weakness was shared 08/03/2015 by Donghai Zhu as XSA-140 as confirmed security advisory (Website). It is possible to read the advisory at xenbits.xen.org. This vulnerability is known as CVE-2015-5165 since 07/01/2015. Attacking locally is a requirement. The requirement for exploitation is a single authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK. The advisory points out:

The QEMU model of the RTL8139 network card did not sufficiently validate inputs in the C+ mode offload emulation. This results in uninitialised memory from the QEMU process's heap being leaked to the domain as well as to the network.

The vulnerability scanner Nessus provides a plugin with the ID 85480 (Fedora 22 : qemu-2.3.1-1.fc22 (2015-13402)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168231 (OpenSuSE Security Update for xen (openSUSE-SU-2015:2003-1)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (85480), SecurityFocus (BID 76153†), SecurityTracker (ID 1033176†) and Vulnerability Center (SBV-51730†). The entries VDB-76323, VDB-76878 and VDB-77069 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Current Price Estimation: 🔍

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Nessus ID: 85480
Nessus Name: Fedora 22 : qemu-2.3.1-1.fc22 (2015-13402)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703348
OpenVAS Name: Debian Security Advisory DSA 3348-1 (qemu - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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Timelineinfo

07/01/2015 🔍
08/03/2015 +33 days 🔍
08/03/2015 +0 days 🔍
08/03/2015 +0 days 🔍
08/03/2015 +0 days 🔍
08/03/2015 +0 days 🔍
08/04/2015 +1 days 🔍
08/04/2015 +0 days 🔍
08/12/2015 +8 days 🔍
06/07/2022 +2491 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: XSA-140
Researcher: Donghai Zhu
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-5165 (🔍)
OVAL: 🔍

SecurityFocus: 76153 - QEMU Realtek rtl8139 Model CVE-2015-5165 Information Disclosure Vulnerability
SecurityTracker: 1033176 - Xen RTL8139 Device Model Memory Initialization Bug Lets Local Users on a Guest System Obtain Potentially Sensitive Information from the Host System
Vulnerability Center: 51730 - Xen through 4.5.x Remote Information Disclosure in QEMU via rtl8139 Device Model, Low

See also: 🔍

Entryinfo

Created: 08/04/2015 10:51 AM
Updated: 06/07/2022 10:17 AM
Changes: 08/04/2015 10:51 AM (71), 09/10/2017 07:22 PM (11), 06/07/2022 10:17 AM (3)
Complete: 🔍
Cache ID: 18:4C7:40

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