QEMU hw/9pfs/9p.c v9fs_read 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 described as problematic has been identified in QEMU. The affected element is the function v9fs_read of the file hw/9pfs/9p.c. Such manipulation leads to resource management. This vulnerability is listed as CVE-2016-8577. The attack must be carried out locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (unknown version) and classified as problematic. Affected by this issue is the function v9fs_read of the file hw/9pfs/9p.c. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. CVE summarizes:

Memory leak in the v9fs_read 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 related to an I/O read operation.

The weakness was presented 11/04/2016 by Li Qiang with 360.cn Inc. (Website). The advisory is shared for download at git.qemu.org. This vulnerability is handled as CVE-2016-8577 since 10/10/2016. The attack needs to be approached locally. The requirement for exploitation is a simple authentication. There are known technical details, 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 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95316) and SecurityFocus (BID 93473†). See VDB-92455, VDB-93309, VDB-93310 and VDB-93312 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Name

License

Website

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: 🔍

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

Patch: e95c9a493a5a8d6f969e86c9f19f80ffe6587e19

Timelineinfo

10/10/2016 🔍
10/10/2016 +0 days 🔍
11/04/2016 +25 days 🔍
11/04/2016 +0 days 🔍
11/07/2016 +3 days 🔍
11/24/2016 +17 days 🔍
11/25/2016 +1 days 🔍
09/29/2022 +2134 days 🔍

Sourcesinfo

Product: qemu.org

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

CVE: CVE-2016-8577 (🔍)
GCVE (CVE): GCVE-0-2016-8577
GCVE (VulDB): GCVE-100-93308
SecurityFocus: 93473 - QEMU 'hw/9pfs/9p.c' Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 11/07/2016 22:10
Updated: 09/29/2022 14:27
Changes: 11/07/2016 22:10 (64), 05/26/2019 16:14 (16), 09/29/2022 14:27 (5)
Complete: 🔍
Cache ID: 216:B6B:103

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