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CVE-2021-3554— Improper Access Control vulnerability in the patchesUpdate API

Quick assessment

Affected
Bitdefender Endpoint Security Tools for Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Bitdefender Endpoint Security Tool是罗马尼亚比特梵德（Bitdefender）公司的一款终端安全管理工具。 Bitdefender Endpoint Security Tools 存在安全漏洞，该漏洞源于软件实现的补丁更新API中不适当的访问控制，该漏洞允许攻击者作为中继角色操纵用于拉补丁的远程地址。

CVSS 9.0 · Critical EPSS 2.12% · P81

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-3554

Vulnerability Information
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Vulnerability Title
Improper Access Control vulnerability in the patchesUpdate API
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Access Control vulnerability in the patchesUpdate API as implemented in Bitdefender Endpoint Security Tools for Linux as a relay role allows an attacker to manipulate the remote address used for pulling patches. This issue affects: Bitdefender Endpoint Security Tools for Linux versions prior to 6.6.27.390; versions prior to 7.1.2.33. Bitdefender Unified Endpoint versions prior to 6.2.21.160. Bitdefender GravityZone versions prior to 6.24.1-1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Bitdefender Endpoint Security Tool 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bitdefender Endpoint Security Tool是罗马尼亚比特梵德（Bitdefender）公司的一款终端安全管理工具。 Bitdefender Endpoint Security Tools 存在安全漏洞，该漏洞源于软件实现的补丁更新API中不适当的访问控制，该漏洞允许攻击者作为中继角色操纵用于拉补丁的远程地址。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Bitdefender Endpoint Security Tools for Linux unspecified ~ 6.6.27.390 -
Bitdefender Unified Endpoint unspecified ~ 6.2.21.160 -
Bitdefender GravityZone unspecified ~ 6.24.1-1 -

II. Public POCs for CVE-2021-3554

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III. Intelligence Information for CVE-2021-3554

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Same Patch Batch · Bitdefender · 2021-11-24 · 3 CVEs total

CVE-2021-3553 5.3 MEDIUM Server-Side Request Forgery in EPPUpdateService remote config file (VA-9825)
CVE-2021-3552 5.3 MEDIUM Insufficient validation on regular expression in EPPUpdateService config file (VA-9825)

IV. Related Vulnerabilities

Same product: Endpoint Security Tools for Linux
Same vendor: Bitdefender
Same weakness: CWE-284

V. Comments for CVE-2021-3554

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