# CVE-2021-3907: cfrpki: OctoRPKI does not escape a URI with a filename containing "..", this allows a repository to create a file, (ex

CVE-2021-3907 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2021-3907, released November 11, 2021. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2021-3907
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0420
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 11, 2021

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cfrpki Debian 12.15 (bookworm) | 1.4.0-1 | [DEBIAN-CVE-2021-3907](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3907.md) | Nov 11, 2021 |
| Linux | fort-validator Debian 11.6 (bullseye) | 1.5.3-1~deb11u1 | [DSA-5033-1](https://patchblox.com/security/data/fix/linux/dsa-5033-1.md) | Dec 30, 2021 |
| Linux | fort-validator Debian 12.15 (bookworm) | 1.5.3-1 | [DEBIAN-CVE-2021-3907](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3907.md) | Nov 11, 2021 |
| Linux | fort-validator Debian 13.5 (trixie) | 1.5.3-1 | [DEBIAN-CVE-2021-3907](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3907.md) | Nov 11, 2021 |
| Linux | fort-validator Debian 14 | 1.5.3-1 | [DEBIAN-CVE-2021-3907](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3907.md) | Nov 11, 2021 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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