CVE-2021-43174
7.5 · HIGHOverview
CVE-2021-43174 is a high-severity vulnerability affecting nlnetlabs routinator. It was published on November 9, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from nlnetlabs. Update routinator to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nlnetlabs | routinator | >= 0.9.0, < 0.10.2 | Affected |
Frequently Asked Questions
What is CVE-2021-43174?
CVE-2021-43174 is a high-severity vulnerability affecting nlnetlabs routinator. It was published on November 9, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-43174?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-43174?
Check the references section for vendor advisories and patches from nlnetlabs. Update routinator to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-43174?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-43174 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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