CVE-2021-43174
mediumpriority · track · 30EPSS 0.011 · 66 %ileEUUSEPSS · scored 2026-10-27
NLnet Labs Routinator versions 0.9.0 up to and including 0.10.1, support the gzip transfer encoding when querying RRDP repositories. This encoding can be used by an RRDP repository to cause an out-of-memory crash in these versions of Routinator. RRDP uses XML which allows arbitrary amounts of white space in the encoded data. The gzip scheme compresses such white space extremely well, leading to very small compressed files that become huge when being decompressed for further processing, big enough that Routinator runs out of memory when parsing input data waiting for the next XML element.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-6mv9-qcx2-3hh3Memory exhaustion in routinator2021-11-11ghsa · osvUS
NLnet Labs Routinator versions 0.9.0 up to and including 0.10.1, support the gzip transfer encoding when querying RRDP repositories. This encoding can be used by an RRDP repository to cause an out-of-memory crash in these versions of Routinator. RRDP uses XML which allows arbitrary amounts of white space in the encoded data. The gzip scheme compresses such white space extremely well, leading to very small compressed files that become huge when being decompressed for further processing, big enough that Routinator runs out of memory when parsing input data waiting for the next XML element.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2021-43174cnnvd
- https://packetstormsecurity.com/files/169190/Debian-Security-Advisory-5041-1.htmlcnnvd
- https://vigilance.fr/vulnerability/NLnet-Labs-Routinator-overload-via-Gzip-Transfer-Encoding-37222cnnvd
- https://www.auscert.org.au/bulletins/ESB-2022.0098cnnvd
- https://www.debian.org/security/2022/dsa-5041cnnvd
- https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txtcnnvd
- https://www.debian.org/security/2022/dsa-5041enisa_euvd
- https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txtenisa_euvd
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