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CVE-2020-11637— Automation Runtime TFTP Service DoS Vulnerability

Quick assessment

Affected
B&R Automation Runtime
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.

B&R Automation Runtime是奥地利贝加莱工业自动化（B&R Automation）公司的是AS的主要组件。 B&R Automation Runtime 存在安全漏洞，该漏洞源于TFTP服务内存泄漏，攻击者可利用该漏洞导致拒绝服务(DoS)条件。以下产本及版本受到影响N4.26之前版本， N4.34之前版本， F4.45之前版本，E4.53之前版本，D4.63之前版本，A4.73之前版本。

CVSS 5.8 · Medium EPSS 1.09% · P64

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2020-11637

Vulnerability Information
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Vulnerability Title
Automation Runtime TFTP Service DoS Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A memory leak in the TFTP service in B&R Automation Runtime versions <N4.26, <N4.34, <F4.45, <E4.53, <D4.63, <A4.73 and prior could allow an unauthenticated attacker with network access to cause a denial of service (DoS) condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: CVE Program / CVE List V5
Vulnerability Title
B&R Automation Runtime 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
B&R Automation Runtime是奥地利贝加莱工业自动化（B&R Automation）公司的是AS的主要组件。 B&R Automation Runtime 存在安全漏洞，该漏洞源于TFTP服务内存泄漏，攻击者可利用该漏洞导致拒绝服务(DoS)条件。以下产本及版本受到影响N4.26之前版本， N4.34之前版本， F4.45之前版本，E4.53之前版本，D4.63之前版本，A4.73之前版本。
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
B&R Automation Runtime unspecified ~ 4.1x -

II. Public POCs for CVE-2020-11637

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III. Intelligence Information for CVE-2020-11637

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Other References for CVE-2020-11637 (1)

Same Patch Batch · B&R · 2020-10-15 · 7 CVEs total

CVE-2020-11641 7.7 HIGH SiteManager Local File Inclusion Vulnerability
CVE-2020-11642 7.7 HIGH SiteManager Denial of Service via Local File Inclusion Vulnerability
CVE-2020-11643 6.5 MEDIUM GateManager Information Disclosure Vulnerability
CVE-2020-11644 6.5 MEDIUM GateManager Audit Message Spoofing Vulnerability
CVE-2020-11645 6.5 MEDIUM GateManager Denial of Service Vulnerability
CVE-2020-11646 4.3 MEDIUM GateManager Log Information Disclosure Vulnerability

IV. Related Vulnerabilities

Same product: Automation Runtime
Same vendor: B&R
Same weakness: CWE-401

V. Comments for CVE-2020-11637

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