QEMU VGA Command hw/display/vmware_vga.c vmsvga_fifo_read_raw memory corruption

CVSS Meta Temp Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in QEMU. Impacted is the function vmsvga_fifo_read_raw of the file hw/display/vmware_vga.c of the component VGA Command Handler. The manipulation results in memory corruption. This vulnerability was named CVE-2016-4454. The attack needs to be approached locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in QEMU (Virtualization Software) (unknown version). Affected is the function vmsvga_fifo_read_raw of the file hw/display/vmware_vga.c of the component VGA Command Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The vmsvga_fifo_read_raw function in hw/display/vmware_vga.c in QEMU allows local OS guest administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggers an out-of-bounds read.

The weakness was presented 06/01/2016 by Li Qiang with 360.cn Inc. (Website). The advisory is shared for download at lists.gnu.org. This vulnerability is traded as CVE-2016-4454 since 05/02/2016. The exploitability is told to be easy. The attack needs to be approached locally. The requirement for exploitation is a authentication. There are known technical details, but no exploit is available.

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 176848 (Debian Security Update for qemu (DLA 1599-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 6 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (94758) and SecurityFocus (BID 90927†). See VDB-81088, VDB-81198, VDB-81711 and VDB-82912 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

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

NVD Base Score: 6.0
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

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

OpenVAS ID: 863050
OpenVAS Name: Fedora Update for qemu FEDORA-2016-73853a7a16
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

05/02/2016 🔍
05/30/2016 +28 days 🔍
06/01/2016 +2 days 🔍
06/01/2016 +0 days 🔍
06/02/2016 +1 days 🔍
11/11/2016 +162 days 🔍
11/14/2016 +3 days 🔍
08/22/2022 +2107 days 🔍

Sourcesinfo

Product: qemu.org

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

CVE: CVE-2016-4454 (🔍)
GCVE (CVE): GCVE-0-2016-4454
GCVE (VulDB): GCVE-100-87708
SecurityFocus: 90927 - QEMU CVE-2016-4454 Memory Corruption Vulnerability

See also: 🔍

Entryinfo

Created: 06/02/2016 13:24
Updated: 08/22/2022 17:34
Changes: 06/02/2016 13:24 (66), 12/27/2018 11:28 (16), 08/22/2022 17:34 (3)
Complete: 🔍
Cache ID: 216::103

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