XenSource Xen 4.4 Multicall 7pk security

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

Summaryinfo

A vulnerability categorized as problematic has been discovered in XenSource Xen 4.4. The impacted element is an unknown function of the component Multicall Handler. The manipulation results in 7pk security. This vulnerability is cataloged as CVE-2015-7812. There is no exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in XenSource Xen 4.4 (Virtualization Software). It has been classified as problematic. Affected is an unknown functionality of the component Multicall Handler. The manipulation with an unknown input leads to a 7pk security vulnerability. CWE is classifying the issue as CWE-254. This is going to have an impact on availability. CVE summarizes:

The hypercall_create_continuation function in arch/arm/domain.c in Xen 4.4.x through 4.6.x allows local guest users to cause a denial of service (host crash) via a preemptable hypercall to the multicall interface.

The weakness was shared 10/29/2015 by Julien Grall with Citrix as XSA-145 as confirmed security advisory (Website). The advisory is available at xenbits.xen.org. This vulnerability is traded as CVE-2015-7812 since 10/14/2015. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1211 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 87288 , 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 175577 (Debian Security Update for xen (DSA 3414-1)).

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 (107664), Tenable (87288), SecurityFocus (BID 77359†) and Vulnerability Center (SBV-54038†). The entries VDB-75144, VDB-77520, VDB-78955 and VDB-78956 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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

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VulDB Base Score: 🔍
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Exploitinginfo

Class: 7pk security
CWE: CWE-254
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: 87288
Nessus File: 🔍
Nessus Risk: 🔍

OpenVAS ID: 703414
OpenVAS Name: Debian Security Advisory DSA 3414-1 (xen - security update)
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

10/14/2015 🔍
10/29/2015 +15 days 🔍
10/29/2015 +0 days 🔍
10/29/2015 +0 days 🔍
10/29/2015 +0 days 🔍
10/30/2015 +1 days 🔍
10/30/2015 +0 days 🔍
11/17/2015 +18 days 🔍
06/25/2022 +2412 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: XSA-145
Researcher: Julien Grall
Organization: Citrix
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7812 (🔍)
GCVE (CVE): GCVE-0-2015-7812
GCVE (VulDB): GCVE-100-78954

OVAL: 🔍

X-Force: 107664 - Xen multicall denial of service
SecurityFocus: 77359 - Xen CVE-2015-7812 Denial of Service Vulnerability
SecurityTracker: 1034031
Vulnerability Center: 54038 - Xen on ARM Remote DoS due to a Failure to Properly Implement \x27multicall\x27 Functionality on Stubs, Medium

See also: 🔍

Entryinfo

Created: 10/30/2015 09:37
Updated: 06/25/2022 13:54
Changes: 10/30/2015 09:37 (71), 03/02/2018 09:33 (6), 06/25/2022 13:48 (3), 06/25/2022 13:54 (1)
Complete: 🔍
Cache ID: 216:892:103

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