Xen up to 4.7.x access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
7.0$5k-$25k0.00

Summaryinfo

A vulnerability classified as problematic was found in Xen up to 4.7.x. Affected by this vulnerability is an unknown functionality. Such manipulation leads to access control. This vulnerability is listed as CVE-2016-9815. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Xen up to 4.7.x (Virtualization Software). Affected by this issue is an unknown function. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is availability. CVE summarizes:

Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host panic) by sending an asynchronous abort.

The bug was discovered 11/29/2016. The weakness was presented 02/27/2017 by ARM engineering personnel. (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2016-9815 since 12/04/2016. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 02/28/2017). The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 90 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 900039 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276348 (Fedora Security Update for xen (FEDORA-2016-1b868c23a9)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (900039) and SecurityFocus (BID 94581†). See VDB-94675, VDB-94726, VDB-94727 and VDB-94728 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 900039
Nessus File: 🔍

OpenVAS ID: 865785
OpenVAS Name: Fedora Update for xen FEDORA-2016-1b868c23a9
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/29/2016 🔍
11/29/2016 +0 days 🔍
12/04/2016 +5 days 🔍
02/27/2017 +85 days 🔍
02/27/2017 +0 days 🔍
02/28/2017 +1 days 🔍
02/28/2017 +0 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: ARM engineering personnel.
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9815 (🔍)
GCVE (CVE): GCVE-0-2016-9815
GCVE (VulDB): GCVE-100-97328
SecurityFocus: 94581 - Xen XSA-201 Denial of Service Vulnerability
OSVDB: - CVE-2016-9815 - Xen - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 02/28/2017 10:28
Changes: 02/28/2017 10:28 (72)
Complete: 🔍
Cache ID: 216:0FC:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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