VDB-94726 · CVE-2016-9913 · BID 94729

QEMU Resource Cleanup hw/9pfs/9p.c v9fs_device_unrealize_common resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

A vulnerability classified as problematic was found in QEMU (Virtualization Software) (affected version not known). This vulnerability affects the function v9fs_device_unrealize_common of the file hw/9pfs/9p.c of the component Resource Cleanup. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

Memory leak in the v9fs_device_unrealize_common function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local privileged guest OS users to cause a denial of service (host memory consumption and possibly QEMU process crash) via vectors involving the order of resource cleanup.

The bug was discovered 12/29/2016. The weakness was released 12/29/2016 by Prasad J Pandit (Website). The advisory is available at git.qemu.org. This vulnerability was named CVE-2016-9913 since 12/08/2016. Local access is required to approach this attack. A single authentication is required for exploitation. Technical details are known, but there is no available exploit.

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 169489 (SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2017:0127-1)).

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 vulnerability database at Tenable (900039). Entries connected to this vulnerability are available at 94671, 94672, 94673 and 94674.

Productinfo

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Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

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: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: 4774718e5c194026ba5ee7a28d9be49be3080e42

Timelineinfo

12/07/2016 🔍
12/08/2016 +1 days 🔍
12/29/2016 +21 days 🔍
12/29/2016 +0 days 🔍
12/29/2016 +0 days 🔍
12/30/2016 +1 days 🔍
10/27/2022 +2127 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: git.qemu.org
Researcher: Prasad J Pandit
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9913 (🔍)
SecurityFocus: 94729 - QEMU VirtFS Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 12/30/2016 10:30
Updated: 10/27/2022 06:55
Changes: 12/30/2016 10:30 (66), 07/22/2019 07:41 (6), 10/27/2022 06:55 (3)
Complete: 🔍

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