QEMU Buffer Descriptor Count hw/net/imx_fec.c imx_fec_do_tx input validation

CVSS Meta Temp Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in QEMU. This impacts the function imx_fec_do_tx of the file hw/net/imx_fec.c of the component Buffer Descriptor Count. The manipulation leads to input validation. This vulnerability is listed as CVE-2016-7907. The attack must be carried out locally. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (the affected version is unknown) and classified as problematic. This issue affects the function imx_fec_do_tx of the file hw/net/imx_fec.c of the component Buffer Descriptor Count. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

The imx_fec_do_tx function in hw/net/imx_fec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.

The weakness was presented 10/05/2016 by Li Qiang with 360.cn Inc. (Website). The advisory is shared at openwall.com. The identification of this vulnerability is CVE-2016-7907 since 09/09/2016. The exploitation is known to be easy. An attack has to be approached locally. A simple authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 95283 (SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2016:2879-1)), 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 169386 (SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2016:2879-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95283) and SecurityFocus (BID 93274†). See VDB-93311 and VDB-94011 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 95283
Nessus Name: SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2016:2879-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for qemu FEDORA-2017-31b976672b
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

09/09/2016 🔍
10/03/2016 +24 days 🔍
10/05/2016 +2 days 🔍
10/05/2016 +0 days 🔍
10/06/2016 +1 days 🔍
11/22/2016 +47 days 🔍
11/23/2016 +1 days 🔍
05/03/2019 +891 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: openwall.com
Researcher: Li Qiang
Organization: 360.cn Inc.
Status: Not defined

CVE: CVE-2016-7907 (🔍)
GCVE (CVE): GCVE-0-2016-7907
GCVE (VulDB): GCVE-100-92453
SecurityFocus: 93274 - QEMU 'hw/net/imx_fec.c' Infinite Loop Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 10/06/2016 09:34
Updated: 05/03/2019 09:25
Changes: 10/06/2016 09:34 (65), 05/03/2019 09:25 (15)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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