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CVE-2021-27385

Quick assessment

Affected
Siemens SIMATIC HMI Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants)
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.

Siemens SmartVNC是德国西门子（Siemens）公司的一个工控设备。提供一个访问HMI中的smartserver功能。 SmartVNC 存在资源管理错误漏洞。攻击者可利用该漏洞导致程序拒绝服务。

AI Predicted 5.3 Difficulty: Easy EPSS 2.56% · P85

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 16

VendorProduct Version RangeStatus
Siemens SIMATIC HMI Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants) All versions < V15.1 Update 6 affected
Siemens SIMATIC HMI Comfort Outdoor Panels V16 7\" & 15\" (incl. SIPLUS variants) All versions < V16 Update 4 affected
Siemens SIMATIC HMI Comfort Panels V15 4\" - 22\" (incl. SIPLUS variants) All versions < V15.1 Update 6 affected
Siemens SIMATIC HMI Comfort Panels V16 4\" - 22\" (incl. SIPLUS variants) All versions < V16 Update 4 affected
Siemens SIMATIC HMI KTP Mobile Panels V15 KTP400F, KTP700, KTP700F, KTP900 and KTP900F All versions < V15.1 Update 6 affected
Siemens SIMATIC HMI KTP Mobile Panels V16 KTP400F, KTP700, KTP700F, KTP900 and KTP900F All versions < V16 Update 4 affected
Siemens SIMATIC WinCC Runtime Advanced V15 All versions < V15.1 Update 6 affected
Siemens SIMATIC WinCC Runtime Advanced V16 All versions < V16 Update 4 affected
Siemens SINAMICS GH150 All versions affected
Siemens SINAMICS GL150 (with option X30) All versions affected
Siemens SINAMICS GM150 (with option X30) All versions affected
Siemens SINAMICS SH150 All versions affected
Siemens SINAMICS SL150 All versions affected
Siemens SINAMICS SM120 All versions affected
Siemens SINAMICS SM150 All versions affected
Siemens SINAMICS SM150i All versions affected
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I. Basic Information for CVE-2021-27385

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been identified in SIMATIC HMI Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants) (All versions < V15.1 Update 6), SIMATIC HMI Comfort Outdoor Panels V16 7\" & 15\" (incl. SIPLUS variants) (All versions < V16 Update 4), SIMATIC HMI Comfort Panels V15 4\" - 22\" (incl. SIPLUS variants) (All versions < V15.1 Update 6), SIMATIC HMI Comfort Panels V16 4\" - 22\" (incl. SIPLUS variants) (All versions < V16 Update 4), SIMATIC HMI KTP Mobile Panels V15 KTP400F, KTP700, KTP700F, KTP900 and KTP900F (All versions < V15.1 Update 6), SIMATIC HMI KTP Mobile Panels V16 KTP400F, KTP700, KTP700F, KTP900 and KTP900F (All versions < V16 Update 4), SIMATIC WinCC Runtime Advanced V15 (All versions < V15.1 Update 6), SIMATIC WinCC Runtime Advanced V16 (All versions < V16 Update 4), SINAMICS GH150 (All versions), SINAMICS GL150 (with option X30) (All versions), SINAMICS GM150 (with option X30) (All versions), SINAMICS SH150 (All versions), SINAMICS SL150 (All versions), SINAMICS SM120 (All versions), SINAMICS SM150 (All versions), SINAMICS SM150i (All versions). A remote attacker could send specially crafted packets to SmartVNC device layout handler on client side, which could influence the amount of resources consumed and result in a Denial-of-Service (infinite loop) condition.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Siemens SmartVNC 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens SmartVNC是德国西门子（Siemens）公司的一个工控设备。提供一个访问HMI中的smartserver功能。 SmartVNC 存在资源管理错误漏洞。攻击者可利用该漏洞导致程序拒绝服务。
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
Siemens SIMATIC HMI Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants) All versions < V15.1 Update 6 -
Siemens SIMATIC HMI Comfort Outdoor Panels V16 7\" & 15\" (incl. SIPLUS variants) All versions < V16 Update 4 -
Siemens SIMATIC HMI Comfort Panels V15 4\" - 22\" (incl. SIPLUS variants) All versions < V15.1 Update 6 -
Siemens SIMATIC HMI Comfort Panels V16 4\" - 22\" (incl. SIPLUS variants) All versions < V16 Update 4 -
Siemens SIMATIC HMI KTP Mobile Panels V15 KTP400F, KTP700, KTP700F, KTP900 and KTP900F All versions < V15.1 Update 6 -
Siemens SIMATIC HMI KTP Mobile Panels V16 KTP400F, KTP700, KTP700F, KTP900 and KTP900F All versions < V16 Update 4 -
Siemens SIMATIC WinCC Runtime Advanced V15 All versions < V15.1 Update 6 -
Siemens SIMATIC WinCC Runtime Advanced V16 All versions < V16 Update 4 -
Siemens SINAMICS GH150 All versions -
Siemens SINAMICS GL150 (with option X30) All versions -
Siemens SINAMICS GM150 (with option X30) All versions -
Siemens SINAMICS SH150 All versions -
Siemens SINAMICS SL150 All versions -
Siemens SINAMICS SM120 All versions -
Siemens SINAMICS SM150 All versions -
Siemens SINAMICS SM150i All versions -

II. Public POCs for CVE-2021-27385

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III. Intelligence Information for CVE-2021-27385

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Vendor Advisories for CVE-2021-27385 (3)

Same Patch Batch · Siemens · 2021-05-12 · 13 CVEs total

CVE-2021-27386 Siemens SIMATIC WinCC 缓冲区错误漏洞
CVE-2021-27396 Siemens Tecnomatix Plant Simulation 安全漏洞
CVE-2021-27397 Siemens Tecnomatix Plant Simulation 缓冲区错误漏洞
CVE-2021-27398 siemens Tecnomatix RobotExpert 安全漏洞
CVE-2021-31339 Siemens Mendix 安全漏洞
CVE-2020-25242 多款 Siemens 设备资源管理错误漏洞
CVE-2021-25660 Siemens SIMATIC WinCC 缓冲区错误漏洞
CVE-2021-25661 Siemens SIMATIC WinCC 安全漏洞
CVE-2021-25662 Siemens SIMATIC WinCC 安全漏洞
CVE-2021-27383 Siemens SmartVNC 缓冲区错误漏洞
CVE-2021-27384 Siemens SIMATIC WinCC 安全漏洞
CVE-2019-19276 多款 Siemens 设备缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: SIMATIC HMI Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants)
Same vendor: Siemens
Same weakness: CWE-400

V. Comments for CVE-2021-27385

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