CVE-2021-43173: vulnerability in NLnet Labs Routinator
Hanging RRDP request
Published · Updated
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3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 1.4%
In NLnet Labs Routinator prior to 0.10.2, a validation run can be delayed significantly by an RRDP repository by not answering but slowly drip-feeding bytes to keep the connection alive. This can be used to effectively stall validation. While Routinator has a configurable time-out value for RRDP connections, this time-out was only applied to individual read or write operations rather than the complete request. Thus, if an RRDP repository sends a little bit of data before that time-out expired, it can continuously extend the time it takes for the request to finish. Since validation will only continue once the update of an RRDP repository has concluded, this delay will cause validation to stall, 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
NLnet Labs · RoutinatorRelated CVEs — NLnet Labs Routinator
In the same product, most dangerous first.
CVE-2021-43174—gzip transfer encoding caused out-of-memory crashEPSS 1.1%CVE-2021-43172—Infinite length chain of RRDP repositoriesEPSS 1.1%CVE-2024-1622HIGHRoutinator terminates when RTR connection is reset too quickly after openingEPSS 1.0%CVE-2021-41531—Invalid RPKI data could disable Route Origin Validation on RTR clients.EPSS 0.9%CVE-2022-3029—Fatal error on incorrect base64 data in RRDPEPSS 0.9%CVE-2023-39916CRITICALPossible path traversal when storing RRDP responsesEPSS 0.6%