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CVE-2021-43172

Published: 9 November 2021

NLnet Labs Routinator prior to 0.10.2 happily processes a chain of RRDP repositories of infinite length causing it to never finish a validation run. In RPKI, a CA can choose the RRDP repository it wishes to publish its data in. By continuously generating a new child CA that only consists of another CA using a different RRDP repository, a malicious CA can create a chain of CAs of de-facto infinite length. Routinator prior to version 0.10.2 did not contain a limit on the length of such a chain and will therefore continue to process this chain forever. As a result, the validation run will never finish, leading to Routinator continuing to serve the old data set or, if in the initial validation run directly after starting, never serve any data at all.

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
cfrpki
Launchpad, Ubuntu, Debian
trusty Ignored
(end of standard support)
upstream Needs triage

xenial Ignored
(end of standard support)
impish Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
jammy Needs triage

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
fort-validator
Launchpad, Ubuntu, Debian
focal Needs triage

trusty Ignored
(end of standard support)
upstream Needs triage

xenial Ignored
(end of standard support)
impish Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
jammy Needs triage

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
rpki-client
Launchpad, Ubuntu, Debian
trusty Ignored
(end of standard support)
upstream
Released (7.5-1)
xenial Ignored
(end of standard support)
impish Ignored
(end of life)
jammy Not vulnerable
(7.6-1)
kinetic Not vulnerable
(7.6-1)
lunar Not vulnerable
(7.6-1)
mantic Not vulnerable
(7.6-1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H