CVE-2021-44679

Veritas Enterprise Vault EVTaskGuardian Deserialization of Untrusted Data Remote Code Execution Vulnerability

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue (3 of 6) was discovered in Veritas Enterprise Vault through 14.1.2. On start-up, the Enterprise Vault application starts several services that listen on random .NET Remoting TCP ports for possible commands from client applications. These TCP services can be exploited due to deserialization behavior that is inherent to the .NET Remoting service. A malicious attacker can exploit both TCP remoting services and local IPC services on the Enterprise Vault Server. This vulnerability is mitigated by properly configuring the servers and firewall as described in the vendor's security alert for this vulnerability (VTS21-003, ZDI-CAN-14074).

Se ha detectado un problema (3 de 6) en Veritas Enterprise Vault versiones hasta 14.1.2. Al arrancar, la aplicación Enterprise Vault inicia varios servicios que escuchan en puertos TCP aleatorios de .NET Remoting para posibles comandos de aplicaciones cliente. Estos servicios TCP pueden ser explotados debido al comportamiento de deserialización que es inherente al servicio .NET Remoting. Un atacante malicioso puede explotar tanto los servicios TCP Remoting como los servicios IPC locales en el Enterprise Vault Server. Esta vulnerabilidad es mitigada al configurar apropiadamente los servidores y el firewall como es descrito en la alerta de seguridad del proveedor para esta vulnerabilidad (VTS21-003, ZDI-CAN-14074)

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Veritas Enterprise Vault. Authentication is not required to exploit this vulnerability.
The specific flaw exists within EVTaskGuardian.exe. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the Enterprise Vault Task Controller Service.

*Credits: Markus Wulftange (@mwulftange)

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-12-06 CVE Reserved
2021-12-06 CVE Published
2024-08-04 CVE Updated
2024-08-21 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-502: Deserialization of Untrusted Data

CAPEC

References (2)

URL	Tag	Source
https://www.zerodayinitiative.com/advisories/ZDI-21-1589	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.veritas.com/content/support/en_US/security/VTS21-003	2022-03-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Veritas Search vendor "Veritas"		Enterprise Vault Search vendor "Veritas" for product "Enterprise Vault"				<= 14.1.2 Search vendor "Veritas" for product "Enterprise Vault" and version " <= 14.1.2"		-		Affected