CVE-2021-43173
Summary
| CVE | CVE-2021-43173 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-11-09 17:15:00 UTC |
| Updated | 2022-08-09 13:42:00 UTC |
| Description | 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. |
Risk And Classification
Problem Types: CWE-400
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Debian | Debian Linux | 11.0 | All | All | All |
| Application | Nlnetlabs | Routinator | All | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Debian -- Security Information -- DSA-5033-1 fort-validator | DEBIAN | www.debian.org | |
| www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-4... | MISC | www.nlnetlabs.nl | |
| Debian -- Security Information -- DSA-5041-1 cfrpki | DEBIAN | www.debian.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
LEGACY: We would like to thank Koen van Hove for the discovery.
Legacy QID Mappings
- 178979 Debian Security Update for fort-validator (DSA 5033-1)
- 178993 Debian Security Update for cfrpki (DSA 5041-1)
- 183836 Debian Security Update for rpki-clientfort-validatorcfrpki (CVE-2021-43173)
- 690764 Free Berkeley Software Distribution (FreeBSD) Security Update for routinator (9c990e67-6e30-11ec-82db-b42e991fc52e)