QEMU Proxy Backend hw/9pfs/9p-proxy.c resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU. It has been classified as problematic. This affects an unknown function of the file hw/9pfs/9p-proxy.c of the component Proxy Backend. This manipulation causes resource consumption. The identification of this vulnerability is CVE-2016-9916. The attack can only be executed locally. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in QEMU (Virtualization Software) (unknown version) and classified as problematic. Affected by this vulnerability is an unknown code block of the file hw/9pfs/9p-proxy.c of the component Proxy Backend. 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. The summary by CVE is:

Memory leak in hw/9pfs/9p-proxy.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) by leveraging a missing cleanup operation in the proxy backend.

The bug was discovered 12/29/2016. The weakness was shared 12/29/2016 by Prasad J Pandit (Website). The advisory is shared at git.qemu.org. This vulnerability is known as CVE-2016-9916 since 12/08/2016. An attack has to be approached locally. The requirement for exploitation is a single authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 96684 (GLSA-201701-49 : QEMU: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276348 (Fedora Security Update for xen (FEDORA-2016-1b868c23a9)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (96684) and SecurityFocus (BID 94729†). The entries VDB-94676, VDB-94726, VDB-94727 and VDB-94728 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.8

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 96684
Nessus Name: GLSA-201701-49 : QEMU: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

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: Upgrade
Status: 🔍

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

Patch: 898ae90a44551d25b8e956fd87372d303c82fe68

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 🔍
01/23/2017 +24 days 🔍
01/23/2017 +0 days 🔍
10/27/2022 +2103 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: DLA 1497-1
Researcher: Prasad J Pandit
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9916 (🔍)
GCVE (CVE): GCVE-0-2016-9916
GCVE (VulDB): GCVE-100-94729
SecurityFocus: 94729 - QEMU VirtFS Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 12/30/2016 10:30
Updated: 10/27/2022 07:17
Changes: 12/30/2016 10:30 (72), 07/22/2019 08:16 (8), 10/27/2022 07:17 (5)
Complete: 🔍
Cache ID: 216:FEA:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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