VMware ESXi/Workstation/Fusion vmxnet3 Virtual Network Adapter memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in VMware ESXi, Workstation and Fusion. The impacted element is an unknown function of the component vmxnet3 Virtual Network Adapter. Performing a manipulation results in memory corruption. This vulnerability is reported as CVE-2018-6981. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in VMware ESXi, Workstation and Fusion (Virtualization Software) (version now known). This affects some unknown processing of the component vmxnet3 Virtual Network Adapter. 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. The summary by CVE is:

VMware ESXi 6.7 without ESXi670-201811401-BG and VMware ESXi 6.5 without ESXi650-201811301-BG, VMware ESXi 6.0 without ESXi600-201811401-BG, VMware Workstation 15, VMware Workstation 14.1.3 or below, VMware Fusion 11, VMware Fusion 10.1.3 or below contain uninitialized stack memory usage in the vmxnet3 virtual network adapter which may allow a guest to execute code on the host.

The bug was discovered 11/09/2018. The weakness was disclosed 12/04/2018 (Website). The advisory is shared at vmware.com. This vulnerability is uniquely identified as CVE-2018-6981 since 02/14/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 118883 (VMware Workstation 14.x < 14.1.4 / 15.x < 15.0.1 vmxnet3 Guest-to-Host Code Execution Vulnerability (VMSA-2018-0027)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family General and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 216174 (VMware ESXi 6.5 Patch Release ESXi650-201811301-BG Missing (VMSA-2018-0027)).

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 (118883) and SecurityFocus (BID 105881†). The entry VDB-127498 is pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.3
VulDB Temp Score: 7.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 118883
Nessus Name: VMware Workstation 14.x < 14.1.4 / 15.x < 15.0.1 vmxnet3 Guest-to-Host Code Execution Vulnerability (VMSA-2018-0027)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/14/2018 🔍
11/09/2018 +268 days 🔍
11/09/2018 +0 days 🔍
11/09/2018 +0 days 🔍
11/12/2018 +3 days 🔍
12/04/2018 +22 days 🔍
12/04/2018 +0 days 🔍
12/05/2018 +1 days 🔍
06/13/2023 +1651 days 🔍

Sourcesinfo

Vendor: vmware.com

Advisory: vmware.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-6981 (🔍)
GCVE (CVE): GCVE-0-2018-6981
GCVE (VulDB): GCVE-100-127497
SecurityFocus: 105881 - Multiple VMware Products CVE-2018-6981 Remote Code Execution Vulnerability
SecurityTracker: 1042054

scip Labs: https://www.scip.ch/en/?labs.20060413
See also: 🔍

Entryinfo

Created: 12/05/2018 08:26
Updated: 06/13/2023 08:13
Changes: 12/05/2018 08:26 (71), 04/17/2020 14:51 (4), 06/13/2023 08:13 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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