QEMU ESP/NCR53C9x Controller Emulation hw/scsi/esp.c esp_do_dma out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU. It has been declared as problematic. This issue affects the function esp_do_dma of the file hw/scsi/esp.c of the component ESP/NCR53C9x Controller Emulation. Such manipulation leads to out-of-bounds write. This vulnerability is referenced as CVE-2016-6351. The attack can only be performed from a local environment. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in QEMU (Virtualization Software) (version now known). Affected by this issue is the function esp_do_dma of the file hw/scsi/esp.c of the component ESP/NCR53C9x Controller Emulation. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The esp_do_dma function in hw/scsi/esp.c in QEMU (aka Quick Emulator), when built with ESP/NCR53C9x controller emulation support, allows local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or execute arbitrary code on the QEMU host via vectors involving DMA read into ESP command buffer.

The weakness was published 09/07/2016 by Li Qiang (Website). The advisory is available at git.qemu.org. This vulnerability is handled as CVE-2016-6351 since 07/26/2016. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 92966 (Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS : qemu, qemu-kvm regression (USN-3047-2)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196546 (Ubuntu Security Notification for Qemu, Qemu-kvm Vulnerabilities (USN-3047-1)).

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 (92966) and SecurityFocus (BID 92119†). Similar entries are available at VDB-87712, VDB-87919, VDB-87920 and VDB-87921. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
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: Out-of-bounds write
CWE: CWE-787 / CWE-119
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: 92966
Nessus Name: Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS : qemu, qemu-kvm regression (USN-3047-2)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 60632
OpenVAS Name: Fedora Update for xen FEDORA-2016-0049aa6e5d
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: 926cde5f3e4d2504ed161ed0cb771ac7cad6fd11

Timelineinfo

07/26/2016 🔍
07/26/2016 +0 days 🔍
08/12/2016 +17 days 🔍
08/15/2016 +3 days 🔍
09/07/2016 +23 days 🔍
09/07/2016 +0 days 🔍
09/08/2016 +1 days 🔍
09/15/2022 +2198 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-3047-2
Researcher: Li Qiang
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6351 (🔍)
GCVE (CVE): GCVE-0-2016-6351
GCVE (VulDB): GCVE-100-91370
SecurityFocus: 92119 - QEMU 'hw/scsi/esp.c' Remote Code Execution Vulnerability

See also: 🔍

Entryinfo

Created: 09/08/2016 21:59
Updated: 09/15/2022 09:29
Changes: 09/08/2016 21:59 (63), 04/12/2019 06:43 (15), 09/15/2022 09:27 (5), 09/15/2022 09:29 (1)
Complete: 🔍
Cache ID: 216::103

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