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TI-2021-19188 Aliases CVE-2021-43174GHSA-6mv9-qcx2-3hh3

gzip transfer encoding caused out-of-memory crash

Priority LOW 35CWE-1325Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-787 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.01127 66th percentileScored 2026-11-07
Fix Fixed routinator (crates.io): 0.10.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
NLnet LabsRoutinatorup to 0.10.1—No fix listedCNA
—routinator (crates.io)0.9.0 to before 0.10.20.10.2Patch availableGHSA-6mv9-qcx2-3hh3
  • Routinator VendorNLnet Labs Affected up to 0.10.1 Fixed in — No fix listed CNA
  • routinator (crates.io) Vendor— Affected 0.9.0 to before 0.10.2 Fixed in 0.10.2 Patch available GHSA-6mv9-qcx2-3hh3

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:nlnetlabs:routinator:*:*:*:*:*:*:*:*0.9.0 to before 0.10.2VulnerableNLNETLABS
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:a:nlnetlabs:routinator:*:*:*:*:*:*:*:* Versions 0.9.0 to before 0.10.2 Vulnerable ·NLNETLABS
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

  • Fix · GHSA-6mv9-qcx2-3hh3 routinator (crates.io) Fixed in 0.10.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43174
  2. 2026-10-03 Alias added: GHSA-6mv9-qcx2-3hh3

References

Advisory 3

Other 1

  • TI-2026-25690 Possible arbitrary code execution during DNSSEC validation CVSS 4.0CRITICAL 9.1
  • TI-2026-56302 Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY CVSS 4.0CRITICAL 9.1
  • TI-2026-31146 Crash during DNSSEC validation of malicious content CVSS 4.0HIGH 8.7
  • TI-2026-31135 Heap overflow with multiple NSID, COOKIE, PADDING EDNS options CVSS 4.0HIGH 8.7
  • TI-2026-36436 Routinator crashes on specifically crafted RRDP XML files CVSS 4.0HIGH 8.7
  • TI-2026-36433 Routinator exits when accepting an incoming HTTP or RTR connection fails CVSS 4.0HIGH 8.7
See all 96 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences