CVE-2021-43174
HIGHDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 64% of all known CVEs.
References
Related Vulnerabilities
Other CWE-1325 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-2511 | Medium | 5.9 | 54% | - | Fix |
| CVE-2023-3341 | High | 7.5 | 2.6% | - | Fix |
| CVE-2024-27804 | Medium | 5.5 | 1.3% | - | Fix |
| CVE-2026-34183 | High | 7.5 | 1.0% | - | Fix |
| CVE-2025-2240 | High | 7.5 | 1.0% | - | - |
| CVE-2023-28968 | Medium | 5.3 | 0.6% | - | Fix |
Common questions
How do I fix CVE-2021-43174?
Upgrade cfrpki on debian 11 to 1.4.2-1~deb11u1 or later.
Is CVE-2021-43174 being actively exploited?
Not that we know of. CVE-2021-43174 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.2% is the estimated probability that it will be exploited in the next 30 days. That is higher than 64% of all scored CVEs.
How severe is CVE-2021-43174?
CVE-2021-43174 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2021-43174 affect?
Published advisories record a fix for cfrpki (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2021-43174
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.