What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-11 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Cloudflare octorpki: before 1.3.0 — fixed in 1.3.0
• Debian Linux: 10.0, 11.0

How to fix

Upgrade to a fixed version: Cloudflare octorpki 1.3.0. Check the vendor advisory for mitigations.

References

• https://github.com/cloudflare/cfrpki/security/advisories/GHSA-3jhm-87m6-x959
• https://github.com/cloudflare/cfrpki/security/advisories/GHSA-cqh2-vc2f-q4fh
• https://www.debian.org/security/2021/dsa-5033
• https://www.debian.org/security/2022/dsa-5041
• https://github.com/cloudflare/cfrpki/security/advisories/GHSA-3jhm-87m6-x959
• https://github.com/cloudflare/cfrpki/security/advisories/GHSA-cqh2-vc2f-q4fh
• https://www.debian.org/security/2021/dsa-5033
• https://www.debian.org/security/2022/dsa-5041

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