VDB-232127 · CVE-2023-20894 · VMSA-2023-0014

VMware vCenter Server/Cloud Foundation DCERPC Protocol out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in VMware vCenter Server and Cloud Foundation. It has been rated as critical. Impacted is an unknown function of the component DCERPC Protocol Handler. The manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2023-20894. The attack is possible to be carried out remotely. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in VMware vCenter Server and Cloud Foundation (Server Management Software) (version unknown). It has been rated as critical. This issue affects an unknown function of the component DCERPC Protocol Handler. 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. The summary by CVE is:

The VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may trigger an out-of-bound write by sending a specially crafted packet leading to memory corruption.

The weakness was disclosed 06/22/2023 as VMSA-2023-0014. It is possible to read the advisory at vmware.com. The identification of this vulnerability is CVE-2023-20894 since 11/01/2022. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/16/2023).

Applying a patch is able to eliminate this problem.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Server Management Software

Vendor

VMware

Name

License

commercial

Website

Vendor: https://www.vmware.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 8.1
CNA Vector (VMware): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/01/2022 🔍
06/22/2023 +232 days 🔍
06/22/2023 +0 days 🔍
07/16/2023 +24 days 🔍

Sourcesinfo

Vendor: vmware.com

Advisory: VMSA-2023-0014
Status: Confirmed

CVE: CVE-2023-20894 (🔍)
GCVE (CVE): GCVE-0-2023-20894
GCVE (VulDB): GCVE-100-232127
scip Labs: https://www.scip.ch/en/?labs.20060413

Entryinfo

Created: 06/22/2023 14:42
Updated: 07/16/2023 19:31
Changes: 06/22/2023 14:42 (30), 06/22/2023 14:43 (20), 07/16/2023 19:31 (11)
Complete: 🔍
Cache ID: 216::103