XenSource Xen 4.3.0 PCI Backend Driver denial of service

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.6$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in XenSource Xen 4.3.0. This issue affects some unknown processing of the component PCI Backend Driver. The manipulation leads to denial of service. This vulnerability is listed as CVE-2015-8551. The attack must be carried out locally. There is no available exploit. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in XenSource Xen 4.3.0 (Virtualization Software) and classified as critical. This issue affects an unknown code of the component PCI Backend Driver. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is confidentiality, integrity, and availability.

The weakness was presented 12/17/2015 by Konrad Rzeszutek Wilk with Oracle as XSA-157 as confirmed security advisory (Website). The advisory is shared at xenbits.xen.org. The identification of this vulnerability is CVE-2015-8551 since 12/14/2015. 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.

The vulnerability scanner Nessus provides a plugin with the ID 87529 (Ubuntu 12.04 LTS : linux vulnerabilities (USN-2846-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168771 (SUSE Enterprise Linux Security update for the Linux Kernel (SUSE-SU-2016:1203-1)).

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 X-Force (109033), Tenable (87529), SecurityFocus (BID 79546†) and Vulnerability Center (SBV-55333†). See VDB-8569, VDB-78541, VDB-79223 and VDB-79228 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.6

VulDB Base Score: 8.2
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.0
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 87529
Nessus Name: Ubuntu 12.04 LTS : linux vulnerabilities (USN-2846-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 850584
OpenVAS Name: SuSE Update for the openSUSE-SU-2016:2184-1 (kernel)
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

12/14/2015 🔍
12/17/2015 +3 days 🔍
12/17/2015 +0 days 🔍
12/17/2015 +0 days 🔍
12/17/2015 +0 days 🔍
12/18/2015 +1 days 🔍
12/18/2015 +0 days 🔍
12/21/2015 +3 days 🔍
04/13/2016 +114 days 🔍
07/01/2022 +2270 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: XSA-157
Researcher: Konrad Rzeszutek Wilk
Organization: Oracle
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-8551 (🔍)
GCVE (CVE): GCVE-0-2015-8551
GCVE (VulDB): GCVE-100-79853

OVAL: 🔍

X-Force: 109033 - Xen PCI backend driver denial of service
SecurityFocus: 79546 - Xen Multiple Denial of Service Vulnerabilities
SecurityTracker: 1034480
Vulnerability Center: 55333 - Xen 3.* Local DoS Vulnerability due to Issue in Linux Pciback - CVE-2015-8551, Low

See also: 🔍

Entryinfo

Created: 12/18/2015 10:00
Updated: 07/01/2022 11:38
Changes: 12/18/2015 10:00 (52), 06/19/2018 20:59 (29), 07/01/2022 11:30 (3), 07/01/2022 11:38 (11)
Complete: 🔍
Cache ID: 216:671:103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!