CVE-2021-3908: cloudflare octorpki Uncontrolled Resource Consumption
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-3908DEBIAN-CVE-2021-3908GHSA-g5gj-9ggf-9vmqGO-2022-0249
Published 11-11-2021Last modified 16-09-2024
Vulnerability summary
CVE-2021-3908 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in cloudflare octorpki. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 53.4% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
0.73%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 11-11-2021PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
Description
OctoRPKI does not limit the depth of a certificate chain, allowing for a CA to create children in an ad-hoc fashion, thereby making tree traversal never end.
CVSS metrics
6 scores · 5 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSources5 sources · 5.9–7.5
- CVE.orgCNA5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · GoEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
0.73%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
0.00 pp
From 0.73% on 20-09-2026
20-09-202620-10-2026
EPSS score0.73%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
Affected systems
Debian2 products
- cfrpki< 1.4.0-1
- debian_linuxEOL11.0
Cloudflare1 product
- octorpki≥ unspecified, < 1.4.0 | < 1.3.0
Github.com/cloudflare1 product
- cfrpki< 1.4.0
Ubuntu1 product
- cfrpki< 1.4.2-1
4 vendors · 5 products
References
9 links- github.com/cloudflare/cfrpki/security/advisories/GHSA-g5gj-9ggf-9vmqX Refsource MISCREPORTWEBAdvisoryThird Party Advisory
- github.com/cloudflare/cfrpkiPACKAGE