CVE-2020-11637— Automation Runtime TFTP Service DoS Vulnerability
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: NVD (National Vulnerability Database)
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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|---|
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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
- CVE-2020-11646
GateManager Log Information Disclosure Vulnerability - CVE-2020-11645
GateManager Denial of Service Vulnerability - CVE-2020-11642
SiteManager Denial of Service via Local File Inclusion Vulne - CVE-2020-11641
SiteManager Local File Inclusion Vulnerability - CVE-2020-11644
GateManager Audit Message Spoofing Vulnerability
Same weakness: CWE-401
- CVE-2026-43506
Prosody 安全漏洞 - CVE-2026-7379
Missing Release of Memory after Effective Lifetime in Wiresh - CVE-2026-40336
libgphoto2 has memory leak in ptp_unpack_Sony_DPD() secondar - CVE-2026-33775
Junos OS: MX Series: Mismatch between configured and receive - CVE-2026-33782
Junos OS: MX Series: In specific DHCPv6 scenarios jdhcpd mem
V. Comments for CVE-2020-11637
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