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CVE-2021-3907— Arbitrary filepath traversal via URI injection

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 存在路径遍历漏洞，攻击者可以在主机上远程执行代码。

CVSS 7.4 · High EPSS 4.06% · P90
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I. Basic Information for CVE-2021-3907

Vulnerability Information
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Vulnerability Title
Arbitrary filepath traversal via URI injection
Source: CVE Program / CVE List V5
Vulnerability Description
OctoRPKI does not escape a URI with a filename containing "..", this allows a repository to create a file, (ex. rsync://example.org/repo/../../etc/cron.daily/evil.roa), which would then be written to disk outside the base cache folder. This could allow for remote code execution on the host machine OctoRPKI is running on.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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 路径遍历漏洞
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 存在路径遍历漏洞，攻击者可以在主机上远程执行代码。
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 ~ 1.4.3 -

II. Public POCs for CVE-2021-3907

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III. Intelligence Information for CVE-2021-3907

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Vendor Advisories for CVE-2021-3907 (4)

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

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
CVE-2021-3911 4.2 MEDIUM Misconfigured IP address field in ROA leads to OctoRPKI crash

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-3907

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