QEMU hw/9pfs/9p.c v9fs_link resource management

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU. It has been rated as problematic. Affected by this vulnerability is the function v9fs_link of the file hw/9pfs/9p.c. Performing a manipulation results in resource management. This vulnerability is reported as CVE-2016-9105. The attack requires a local approach. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in QEMU (Virtualization Software) (version unknown). This affects the function v9fs_link of the file hw/9pfs/9p.c. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

Memory leak in the v9fs_link function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (memory consumption) via vectors involving a reference to the source fid object.

The bug was discovered 12/09/2016. The weakness was disclosed 12/09/2016 by Li Qiang with 360.cn Inc. (Website). The advisory is shared at git.qemu.org. This vulnerability is uniquely identified as CVE-2016-9105 since 10/28/2016. An attack has to be approached locally. The successful exploitation requires a authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 95316 (SUSE SLES11 Security Update : kvm (SUSE-SU-2016:2902-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169412 (SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2016:2988-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95316) and SecurityFocus (BID 93965†). The entries VDB-92455, VDB-93308, VDB-93309 and VDB-93310 are pretty similar. 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: 6.0
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.0
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.0
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / 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: 95316
Nessus Name: SUSE SLES11 Security Update : kvm (SUSE-SU-2016:2902-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 65785
OpenVAS Name: SuSE Update for qemu openSUSE-SU-2016:3103-1 (qemu)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: 4c1586787ff43c9acd18a56c12d720e3e6be9f7c

Timelineinfo

10/28/2016 🔍
10/28/2016 +0 days 🔍
11/24/2016 +27 days 🔍
11/25/2016 +1 days 🔍
12/09/2016 +14 days 🔍
12/09/2016 +0 days 🔍
12/09/2016 +0 days 🔍
12/10/2016 +1 days 🔍
10/05/2022 +2125 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: DLA 1599-1
Researcher: Li Qiang
Organization: 360.cn Inc.
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9105 (🔍)
GCVE (CVE): GCVE-0-2016-9105
GCVE (VulDB): GCVE-100-94017
SecurityFocus: 93965 - QEMU 'v9fs_link()' Function Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 12/10/2016 13:39
Updated: 10/05/2022 12:34
Changes: 12/10/2016 13:39 (62), 06/23/2019 06:55 (17), 10/05/2022 12:34 (5)
Complete: 🔍
Cache ID: 216::103

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

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