QEMU up to 2.8 Cirrus CLGD 54xx VGA Emulator memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

A vulnerability was found in QEMU up to 2.8 (Virtualization Software). It has been declared as critical. This vulnerability affects some unknown processing of the component Cirrus CLGD 54xx VGA Emulator. 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. CVE summarizes:

A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

The bug was discovered 03/14/2017. The weakness was shared 07/27/2018 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability was named CVE-2016-9603 since 11/22/2016. Local access is required to approach this attack. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 97948 (Citrix XenServer QEMU Display Geometry Resize Handling Guest-to-Host Code Execution (CTX221578)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196757 (Ubuntu Security Notification for Qemu Vulnerabilities (USN-3261-1)).

Upgrading to version 2.9 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 vulnerability database at Tenable (97948). The entries 95545 and 97321 are related to this item.

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.9
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector (Red Hat, Inc.): 🔍

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 97948
Nessus Name: Citrix XenServer QEMU Display Geometry Resize Handling Guest-to-Host Code Execution (CTX221578)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for qemu-guest-agent CESA-2017:1206 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: QEMU 2.9

Timelineinfo

11/22/2016 🔍
03/13/2017 +111 days 🔍
03/14/2017 +0 days 🔍
03/14/2017 +0 days 🔍
03/24/2017 +10 days 🔍
07/27/2018 +489 days 🔍
07/27/2018 +0 days 🔍
07/28/2018 +1 days 🔍
04/27/2023 +1734 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2017:0980
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9603 (🔍)
SecurityTracker: 1038023
SecurityFocus: 96893 - QEMU CVE-2016-9603 Heap Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 07/28/2018 07:22
Updated: 04/27/2023 09:01
Changes: 07/28/2018 07:22 (75), 03/10/2020 17:25 (4), 04/27/2023 08:58 (5), 04/27/2023 09:01 (12)
Complete: 🔍

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