| Name | CVE-2021-43172 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 929024 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| rpki-client (PTS) | bullseye | 6.8p1-2 | vulnerable |
| bookworm | 8.2-2 | fixed | |
| sid, trixie | 9.3-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| routinator | ITP | 929024 | ||||
| rpki-client | source | (unstable) | 7.5-1 |
[bullseye] - rpki-client <ignored> (Fixed versions need more recent libretls)
https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txt
https://github.com/NLnetLabs/routinator/pull/665