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Fencer Intel
medium 4.2

CVE-2021-3912 json

OctoRPKI crashes when processing GZIP bomb returned via malicious repository

published 4y ago modified 4mo ago also GHSA-g9wh-3vrx-r7hg , GO-2022-0253 , EUVD-2021-2346

cvss
4.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

OctoRPKI tries to load the entire contents of a repository in memory, and in the case of a GZIP bomb, unzip it in memory, making it possible to create a repository that makes OctoRPKI run out of memory (and thus crash).

Patch / fix

  • go github.com/cloudflare/cfrpki 1.4.0
  • Cloudflare octorpki 1.4.0
  • cfrpki Debian 12 1.4.0-1

debian advisories DEBIAN-CVE-2021-3912

Is CVE-2021-3912 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.2 CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P
GitHub 3.1 4.2 CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/cloudflare/cfrpki
<1.4.0
1.4.0

Affected products

  • Cloudflare octorpki

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.