XenSource Xen 4.6.x on x86 HVM Guest Log HVM_PARAM_CALLBACK_IRQ 7pk security

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in XenSource Xen 4.6.x on x86 HVM Guest. Affected by this vulnerability is the function HVM_PARAM_CALLBACK_IRQ of the component Log Handler. Executing a manipulation can lead to 7pk security. This vulnerability is tracked as CVE-2015-8615. The attack can be launched remotely. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in XenSource Xen 4.6.x on x86 HVM Guest (Virtualization Software). It has been declared as critical. This vulnerability affects the function HVM_PARAM_CALLBACK_IRQ of the component Log Handler. The manipulation with an unknown input leads to a 7pk security vulnerability. The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect confidentiality, and availability.

The weakness was disclosed 12/21/2015 by Malcolm Crossley with Citrix as XSA-169 as confirmed security advisory (Website). The advisory is available at xenbits.xen.org. This vulnerability was named CVE-2015-8615 since 12/22/2015. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1211 by the MITRE ATT&CK project. The advisory points out:

HYPERVISOR_hvm_op sub-op HVMOP_set_param's HVM_PARAM_CALLBACK_IRQ operation intends to log the new callback method in debug builds only. The full message, however, is split into two parts, the second one of which didn't get suppressed on non-debug builds as would have been intended. These log messages are not rate-limited and can be triggered by guests.

The vulnerability scanner Nessus provides a plugin with the ID 91198 (Debian DLA-479-1 : xen security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.

Applying the patch xsa169.patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xen.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (91198), SecurityFocus (BID 79644†), SecurityTracker (ID 1034512†) and Vulnerability Center (SBV-55377†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 8.6
VulDB Temp Score: 8.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.0
NVD Vector: 🔍

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: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91198
Nessus Name: Debian DLA-479-1 : xen security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: xsa169.patch

Timelineinfo

12/21/2015 🔍
12/21/2015 +0 days 🔍
12/21/2015 +0 days 🔍
12/21/2015 +0 days 🔍
12/22/2015 +1 days 🔍
12/22/2015 +0 days 🔍
12/23/2015 +1 days 🔍
01/08/2016 +16 days 🔍
05/18/2016 +131 days 🔍
07/01/2022 +2235 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: XSA-169
Researcher: Malcolm Crossley
Organization: Citrix
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-8615 (🔍)
GCVE (CVE): GCVE-0-2015-8615
GCVE (VulDB): GCVE-100-79882
SecurityFocus: 79644 - Xen 'hvm/irq.c' Denial of Service Vulnerability
SecurityTracker: 1034512
Vulnerability Center: 55377 - Xen 4.6 Remote DoS due to a Flaw in the Callback Method, Medium

Entryinfo

Created: 12/22/2015 23:13
Updated: 07/01/2022 13:35
Changes: 12/22/2015 23:13 (64), 06/19/2018 21:06 (23), 07/01/2022 13:35 (4)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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