Linux Foundation Xen up to 4.4.0 HVM Controller HVMOP_inject_msi null pointer dereference

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2.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Foundation Xen up to 4.4.0 and classified as problematic. This impacts the function HVMOP_inject_msi of the component HVM Controller. This manipulation causes null pointer dereference. The identification of this vulnerability is CVE-2014-3967. There is no exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as problematic was found in Linux Foundation Xen up to 4.4.0 (Virtualization Software). Affected by this vulnerability is the function HVMOP_inject_msi of the component HVM Controller. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The weakness was shared 06/03/2014 by Jan Beulich with SuSE as XSA-96 as confirmed advisory (Website). The advisory is shared at xenbits.xenproject.org. The vendor cooperated in the coordination of the public release. The advisory contains:

The vulnerability is only exposed to service domains for HVM guests which have privilege over the guest. In a usual configuration that means only device model emulators (qemu-dm).
This vulnerability is known as CVE-2014-3967 since 06/04/2014. An attack has to be approached locally. A single authentication is necessary for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 76221 (Fedora 20 : xen-4.3.2-5.fc20 (2014-7423)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 123186 (Fedora Security Update for xen (FEDORA-2015-0331)).

Applying the patch xsa96.patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xenproject.org. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Running only PV guests will avoid this vulnerability. In a radically disaggregated system, restricting HVM service domains to software images approved by the host administrator will avoid the vulnerability.

The vulnerability is also documented in the databases at X-Force (93606), Tenable (76221), SecurityFocus (BID 67794†), OSVDB (107703†) and SecurityTracker (ID 1030322†). The entries VDB-12695, VDB-13087, VDB-13151 and VDB-13468 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 2.9

VulDB Base Score: 3.3
VulDB Temp Score: 2.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 76221
Nessus Name: Fedora 20 : xen-4.3.2-5.fc20 (2014-7423)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 801150
OpenVAS Name: Fedora Update for xen FEDORA-2014-15503
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: 🔍

Patch: xsa96.patch

Timelineinfo

06/03/2014 🔍
06/03/2014 +0 days 🔍
06/03/2014 +0 days 🔍
06/04/2014 +1 days 🔍
06/04/2014 +0 days 🔍
06/04/2014 +0 days 🔍
06/05/2014 +1 days 🔍
06/05/2014 +0 days 🔍
06/26/2014 +21 days 🔍
06/20/2021 +2551 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-96
Researcher: Jan Beulich
Organization: SuSE
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2014-3967 (🔍)
GCVE (CVE): GCVE-0-2014-3967
GCVE (VulDB): GCVE-100-13429

OVAL: 🔍

X-Force: 93606 - Xen HVMOP_inject_msi HVM control denial of service, Low Risk
SecurityFocus: 67794 - Xen 'HVM MSI injection' CVE-2014-3967 Denial of Service Vulnerability
OSVDB: 107703
SecurityTracker: 1030322
Vulnerability Center: 44754 - XenProject Xen 4.2 through 4.4 Remote DoS due to Improper Check of NULL Pointers in the HVM Control Operation, Medium

See also: 🔍

Entryinfo

Created: 06/04/2014 10:07
Updated: 06/20/2021 14:45
Changes: 06/04/2014 10:07 (77), 06/26/2018 08:42 (15), 06/20/2021 14:45 (3)
Complete: 🔍
Cache ID: 216:6A7:103

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