CVE-2021-3912: OctoRPKI crashes when processing GZIP bomb returned via malicious repository
First published: Mon Nov 01 2021(Updated: )
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).
Credit: cna@cloudflare.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/cfrpki | 1.4.2-1~deb11u1 1.4.4-1 1.5.10-2 | |
| Cloudflare Octorpki | <1.3.0 | |
| Debian Debian Linux | =11.0 |
Remedy
Upgrade to 1.4
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-3912?
The severity of CVE-2021-3912 is medium with a CVSS score of 6.5.
Which software is affected by CVE-2021-3912?
The affected software includes 'cfrpki' package version 1.4.2-1~deb11u1, 1.4.4-1, and 1.5.10-2 from the Debian repository, as well as 'Cloudflare Octorpki' version up to exclusive 1.3.0.
How can I fix CVE-2021-3912?
The recommended remedy for CVE-2021-3912 is to update the affected 'cfrpki' package to version 1.4.2-1~deb11u1, 1.4.4-1, or 1.5.10-2 from the Debian repository. For 'Cloudflare Octorpki', update to a version higher than 1.3.0.
What is a GZIP bomb?
A GZIP bomb is a maliciously crafted compressed file that exploits the way gzip decompression works to consume excessive memory and potentially crash the system or application.
Where can I find more information about CVE-2021-3912?
You can find more information about CVE-2021-3912 on the GitHub security advisory page (https://github.com/cloudflare/cfrpki/security/advisories/GHSA-g9wh-3vrx-r7hg) and the Debian security tracker page (https://security-tracker.debian.org/tracker/CVE-2021-3912). Additionally, the Debian website has a security announcement (https://www.debian.org/security/2022/dsa-5041) with further details.
- collector/security-tracker-debian
- collector/nvd-index
- agent/weakness
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/author
- agent/references
- agent/remedy
- agent/last-modified-date
- agent/title
- agent/description
- agent/tags
- agent/event
- agent/first-publish-date
- package-manager/debian
- vendor/cloudflare
- canonical/cloudflare octorpki
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/11.0