CVE-2021-3907

Publication date 11 November 2021

Last updated 9 October 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
cfrpki	25.10 questing	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Ignored end of life, was needs-triage
	23.04 lunar	Ignored end of life, was needs-triage
	22.10 kinetic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Not affected
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support
fort-validator	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Ignored end of life
	24.04 LTS noble	Not affected
	23.10 mantic	Ignored end of life
	23.04 lunar	Ignored end of life
	22.10 kinetic	Ignored end of life
	22.04 LTS jammy	Not affected
	21.10 impish	Ignored end of life
	20.04 LTS focal	Vulnerable
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support

Notes

ej7367

Although the CVE description only mentions OctoRPKI, fort-validator before v1.5.3 is also vulnerable to this type of attack.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
fort-validator	Upstream: d7a5633 Upstream: 48d352a

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H