CVE-2021-27899

Severity Score

7.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.

Los Agentes Proofpoint Insider Threat Management (anteriormente ObserveIT Agent) para MacOS y Linux llevan a cabo una comprobación inapropiada del certificado del servidor ITM, lo que permite a un atacante remoto interceptar y alterar estas comunicaciones usando un ataque de tipo man-in-the-middle. Todas las versiones anteriores a 7.11.1 están afectadas. Los agentes para Windows y Cloud no están afectados

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-03-02 CVE Reserved
2021-04-06 CVE Published
2024-08-03 CVE Updated
2024-12-22 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-295: Improper Certificate Validation

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2021-0004	2021-04-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Proofpoint Search vendor "Proofpoint"		Insider Threat Management Search vendor "Proofpoint" for product "Insider Threat Management"				>= 7.9.0 < 7.9.3 Search vendor "Proofpoint" for product "Insider Threat Management" and version " >= 7.9.0 < 7.9.3"		linux		Affected
Proofpoint Search vendor "Proofpoint"		Insider Threat Management Search vendor "Proofpoint" for product "Insider Threat Management"				>= 7.10.0 < 7.10.3 Search vendor "Proofpoint" for product "Insider Threat Management" and version " >= 7.10.0 < 7.10.3"		linux		Affected
Proofpoint Search vendor "Proofpoint"		Insider Threat Management Search vendor "Proofpoint" for product "Insider Threat Management"				>= 7.11.0 < 7.11.1 Search vendor "Proofpoint" for product "Insider Threat Management" and version " >= 7.11.0 < 7.11.1"		linux		Affected
Proofpoint Search vendor "Proofpoint"		Insider Threat Management Search vendor "Proofpoint" for product "Insider Threat Management"				>= 7.9.0 < 7.9.3 Search vendor "Proofpoint" for product "Insider Threat Management" and version " >= 7.9.0 < 7.9.3"		macos		Affected
Proofpoint Search vendor "Proofpoint"		Insider Threat Management Search vendor "Proofpoint" for product "Insider Threat Management"				>= 7.10.0 < 7.10.3 Search vendor "Proofpoint" for product "Insider Threat Management" and version " >= 7.10.0 < 7.10.3"		macos		Affected
Proofpoint Search vendor "Proofpoint"		Insider Threat Management Search vendor "Proofpoint" for product "Insider Threat Management"				>= 7.11.0 < 7.11.1 Search vendor "Proofpoint" for product "Insider Threat Management" and version " >= 7.11.0 < 7.11.1"		macos		Affected