CVE-2021-3908— Infinite certificate chain depth results in OctoRPKI running forever
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，该漏洞允许CA通过特定的方式创建子节点从而进行遍历目录结构。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-3908
Vulnerability Information
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Vulnerability Title
Infinite certificate chain depth results in OctoRPKI running forever
Source: CVE Program / CVE List V5
Vulnerability Description
OctoRPKI does not limit the depth of a certificate chain, allowing for a CA to create children in an ad-hoc fashion, thereby making tree traversal never end.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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
Cloudflare OctoRPKI 资源管理错误漏洞
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，该漏洞允许CA通过特定的方式创建子节点从而进行遍历目录结构。
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-2021-3908
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2021-3908 (2)
Same Patch Batch · Cloudflare · 2021-11-11 · 6 CVEs total
| CVE-2021-3907 | 7.4 HIGH | Arbitrary filepath traversal via URI injection |
| CVE-2021-3910 | 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 |
| CVE-2021-3911 | 4.2 MEDIUM | Misconfigured IP address field in ROA leads to OctoRPKI crash |
IV. Related Vulnerabilities
Same product: octorpki
-
CVE-2021-3978
Improper Preservation of Permissions in github.com/cloudflar -
CVE-2022-3616
OctoRPKI crash when maximum iterations number is reached -
CVE-2021-3912
OctoRPKI crashes when processing GZIP bomb returned via mali -
CVE-2021-3911
Misconfigured IP address field in ROA leads to OctoRPKI cras -
CVE-2021-3910
NUL character in ROA causes OctoRPKI to crash
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V. Comments for CVE-2021-3908
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