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CVE-2021-43172 NLnet Labs Routinator prior to 0.10.2 happily processes a chain of RRDP repositories of infinite length causing it to…

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.

Affected products and versions

Product Affected versions Fixed in
Routinator 0.10 earliest → 0.10.1 No fix stated

Other CVEs of Routinator

The 20 CVEs of Routinator →
CVE-2026-72758 When parsing an AS range in Routinator, if the maximum value of the range is smaller than the minimum value of the… 7.5 High CVE-2026-72757 Routinator runs out of open connections on the HTTP server when many connections are opened but never closed, leaving… 5.3 Medium CVE-2026-72756 Routinator exits when an rsync URI for a file obtained over RRDP contains a path that cannot be stored on disk, such… 7.5 High CVE-2026-72755 Routinator stores a newly-retrieved TA certificate via HTTPS in cache without validation, potentially overwriting a… 3.8 Low
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