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CVE-2021-3911— Misconfigured IP address field in ROA leads to OctoRPKI crash

Quick assessment

Affected
Cloudflare octorpki
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.

Cloudflare OctoRPKI是美国cloudflare（Cloudflare）的Cloudflare平台的RPKI工具箱。 Cloudflare OctoRPKI 存在安全漏洞，该漏洞源于网络系统或产品的代码开发过程中存在设计或实现不当的问题。

CVSS 4.2 · Medium EPSS 0.88% · P56

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2021-3911

Vulnerability Information
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Vulnerability Title
Misconfigured IP address field in ROA leads to OctoRPKI crash
Source: CVE Program / CVE List V5
Vulnerability Description
If the ROA that a repository returns contains too many bits for the IP address then OctoRPKI will crash.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cloudflare OctoRPKI 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cloudflare OctoRPKI是美国cloudflare（Cloudflare）的Cloudflare平台的RPKI工具箱。 Cloudflare OctoRPKI 存在安全漏洞，该漏洞源于网络系统或产品的代码开发过程中存在设计或实现不当的问题。
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
Cloudflare octorpki unspecified ~ 1.4.0 -

II. Public POCs for CVE-2021-3911

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III. Intelligence Information for CVE-2021-3911

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Vendor Advisories for CVE-2021-3911 (2)

Same Patch Batch · Cloudflare · 2021-11-11 · 6 CVEs total

CVE-2021-3907 7.4 HIGH Arbitrary filepath traversal via URI injection
CVE-2021-3908 5.9 MEDIUM Infinite certificate chain depth results in OctoRPKI running forever
CVE-2021-3910 4.4 MEDIUM NUL character in ROA causes OctoRPKI to crash
CVE-2021-3909 4.4 MEDIUM Infinite open connection causes OctoRPKI to hang forever
CVE-2021-3912 4.2 MEDIUM OctoRPKI crashes when processing GZIP bomb returned via malicious repository

IV. Related Vulnerabilities

Same product: octorpki
Same vendor: Cloudflare
Same weakness: CWE-20

V. Comments for CVE-2021-3911

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