Xen 4.7.x 32-bit ELF Symbol Table Loader Host information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.00

A vulnerability classified as critical has been found in Xen 4.7.x (Virtualization Software). This affects an unknown function of the component 32-bit ELF Symbol Table Loader. The manipulation with an unknown input leads to a information disclosure vulnerability (Host). CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Xen 4.7 allows local guest OS users to obtain sensitive host information by loading a 32-bit ELF symbol table.

The bug was discovered 11/22/2016. The weakness was disclosed 11/22/2016 by Roger Pau Monne with Citrix as XSA-194 as confirmed security advisory (Website). It is possible to read the advisory at xenbits.xen.org. The public release has been coordinated in cooperation with the project team. This vulnerability is uniquely identified as CVE-2016-9384 since 11/17/2016. The exploitability is told to be easy. Attacking locally is a requirement. The successful exploitation requires a 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 vulnerability scanner Nessus provides a plugin with the ID 95508 (FreeBSD : xen-kernel -- guest 32-bit ELF symbol table load leaking host data (5555120d-ba4d-11e6-ae1b-002590263bf5)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276244 (Fedora Security Update for xen (FEDORA-2016-999e1a6927)).

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 vulnerability database at Tenable (95508). The entries 93805, 93806, 93808 and 93809 are pretty similar.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Host
Class: Information disclosure / Host
CWE: CWE-200 / CWE-284 / CWE-266
ATT&CK: T1592

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95508
Nessus Name: FreeBSD : xen-kernel -- guest 32-bit ELF symbol table load leaking host data (5555120d-ba4d-11e6-ae1b-002590263bf5)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 58605
OpenVAS Name: Fedora Update for xen FEDORA-2016-999e1a6927
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

11/17/2016 🔍
11/22/2016 +5 days 🔍
11/22/2016 +0 days 🔍
11/22/2016 +0 days 🔍
11/22/2016 +0 days 🔍
11/25/2016 +3 days 🔍
11/25/2016 +0 days 🔍
12/05/2016 +10 days 🔍
02/22/2017 +79 days 🔍
06/10/2019 +838 days 🔍

Sourcesinfo

Advisory: XSA-194
Researcher: Roger Pau Monne
Organization: Citrix
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-9384 (🔍)
SecurityTracker: 1037343
SecurityFocus: 94468 - Xen CVE-2016-9384 Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 11/25/2016 11:52
Updated: 06/10/2019 06:36
Changes: 11/25/2016 11:52 (74), 06/10/2019 06:36 (14)
Complete: 🔍

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