QEMU FileOperations hw/9pfs/9p.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 has been found in QEMU and classified as problematic. The affected element is an unknown function of the file hw/9pfs/9p.c of the component FileOperations. The manipulation leads to resource consumption. This vulnerability is uniquely identified as CVE-2016-9914. Local access is required to approach this attack. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in QEMU (Virtualization Software) (the affected version unknown). This issue affects an unknown part of the file hw/9pfs/9p.c of the component FileOperations. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

Memory leak 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) by leveraging a missing cleanup operation in FileOperations.

The bug was discovered 12/29/2016. The weakness was disclosed 12/29/2016 by Prasad J Pandit (Website). It is possible to read the advisory at git.qemu.org. The identification of this vulnerability is CVE-2016-9914 since 12/08/2016. Attacking locally is a requirement. A simple authentication is necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

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-94728 and VDB-94729 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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License

Website

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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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 702dbcc274e2ca43be20ba64c758c0ca57dab91d

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-2016-9914 (🔍)
GCVE (CVE): GCVE-0-2016-9914
GCVE (VulDB): GCVE-100-94727
SecurityFocus: 94729 - QEMU VirtFS Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 12/30/2016 10:30
Updated: 10/27/2022 07:07
Changes: 12/30/2016 10:30 (72), 07/22/2019 07:54 (8), 10/27/2022 07:07 (5)
Complete: 🔍
Cache ID: 216:340:103

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