QEMU Descriptor hw/virtio/virtio.c virtqueue_map_desc length input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in QEMU. Affected is the function virtqueue_map_desc of the file hw/virtio/virtio.c of the component Descriptor Handler. Executing a manipulation of the argument length can lead to input validation. The identification of this vulnerability is CVE-2016-6490. The attack can only be executed locally. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (unknown version). It has been declared as problematic. This vulnerability affects the function virtqueue_map_desc of the file hw/virtio/virtio.c of the component Descriptor Handler. The manipulation of the argument length with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a zero length for the descriptor buffer.

The bug was discovered 12/09/2016. The weakness was shared 12/10/2016 (Website). The advisory is available at git.qemu.org. This vulnerability was named CVE-2016-6490 since 07/28/2016. Local access is required to approach this attack. The requirement for exploitation is a single authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 94758 (SUSE SLES12 Security Update : qemu (SUSE-SU-2016:2781-1)), 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 276208 (Fedora Security Update for qemu (FEDORA-2016-a56fb613a8)).

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

The vulnerability is also documented in the databases at Tenable (94758) and SecurityFocus (BID 69356†). The entries VDB-67403, VDB-87707, VDB-87708 and VDB-87919 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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License

Website

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

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

NVD Base Score: 🔍

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: 94758
Nessus Name: SUSE SLES12 Security Update : qemu (SUSE-SU-2016:2781-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 70791
OpenVAS Name: Fedora Update for qemu FEDORA-2016-a56fb613a8
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: 1e7aed70144b4673fc26e73062064b6724795e5f

Timelineinfo

07/28/2016 🔍
11/11/2016 +106 days 🔍
11/14/2016 +3 days 🔍
12/09/2016 +25 days 🔍
12/09/2016 +0 days 🔍
12/10/2016 +1 days 🔍
12/10/2016 +0 days 🔍
10/05/2022 +2125 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: git.qemu.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6490 (🔍)
GCVE (CVE): GCVE-0-2016-6490
GCVE (VulDB): GCVE-100-93994
SecurityFocus: 69356

See also: 🔍

Entryinfo

Created: 12/10/2016 13:38
Updated: 10/05/2022 09:33
Changes: 12/10/2016 13:38 (62), 06/22/2019 17:15 (14), 10/05/2022 09:33 (5)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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