QEMU 53C9X Fast SCSI Controller Support hw/scsi/esp.c esp_reg_write memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

A vulnerability was found in QEMU (Virtualization Software) (the affected version unknown). It has been declared as critical. Affected by this vulnerability is the function esp_reg_write of the file hw/scsi/esp.c of the component 53C9X Fast SCSI Controller Support. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The esp_reg_write function in hw/scsi/esp.c in the 53C9X Fast SCSI Controller (FSC) support in QEMU does not properly check command buffer length, which allows local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the QEMU host via unspecified vectors.

The weakness was shared 05/20/2016 by Li Qiang with 360.cn Inc. (Website). It is possible to read the advisory at lists.gnu.org. This vulnerability is known as CVE-2016-4439 since 05/02/2016. The exploitation appears to be easy. Attacking locally is a requirement. A single authentication is necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 91660 (SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2016:1560-1)), 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 176848 (Debian Security Update for qemu (DLA 1599-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (91660). The entries 81088, 81154, 81155 and 81198 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.4

VulDB Base Score: 9.0
VulDB Temp Score: 8.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Nessus ID: 91660
Nessus Name: SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2016:1560-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 52312
OpenVAS Name: Fedora Update for xen FEDORA-2016-cfea37952b
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

05/02/2016 🔍
05/19/2016 +17 days 🔍
05/20/2016 +1 days 🔍
05/20/2016 +0 days 🔍
05/21/2016 +1 days 🔍
06/13/2016 +23 days 🔍
06/17/2016 +4 days 🔍
08/21/2022 +2256 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-3047-1
Researcher: Li Qiang
Organization: 360.cn Inc.
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4439 (🔍)
SecurityFocus: 90760 - QEMU CVE-2016-4439 Remote Code Execution Vulnerability

See also: 🔍

Entryinfo

Created: 05/21/2016 18:06
Updated: 08/21/2022 13:18
Changes: 05/21/2016 18:06 (65), 12/07/2018 12:19 (16), 08/21/2022 13:18 (3)
Complete: 🔍

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