CVE-2021-3641 - CVE House

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Status published Medium CVE-2021-3641

Improper Link Resolution Before File Access in Bitdefender GravityZone (VA-9921)

6.1 CVSS

Vulnerability Description

Improper Link Resolution Before File Access ('Link Following') vulnerability in the EPAG component of Bitdefender Endpoint Security Tools for Windows allows a local attacker to cause a denial of service. This issue affects: Bitdefender GravityZone version 7.1.2.33 and prior versions.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

@Kharosx0 working with Trend Micro Zero Day Initiative

References

More from Bitdefender

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Local Privilege Escalation via Arbitrary File Operation in Bitdefender Total Security

Improper access restriction to critical folder in Bitdefender Endpoint Security Tools for Mac

Server Side Request Forgery in GravityZone Update Server Using Null Bytes (VA-12646)

Insecure PHP deserialization issue in GravityZone Console (VA-12634)

SSRF in GravityZone Console via DNS Truncation (VA-12634)

Affected Vendor

Bitdefender

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Affected Software

GravityZone

Vulnerable Versions:

unspecified

Timeline

Official Publish: November 9th, 2021

Last Modified: September 17th, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1574 Hijack Execution Flow

Privilege Escalation

T1222 File and Directory Permissions Modification

Defense Evasion

T1005 Data from Local System

T1565 Data Manipulation

T1078 Valid Accounts