CVE-2021-3911: Github.com/cloudflare/cfrpki Misconfigured IP Address Field Vulnerability

MODERATE
Advisory Identifier: GHSA-w6ww-fmfx-2x22
Share
CVSS 4.2
CWE-252 CWE-20
Published
Advisory Summary

CVE-2021-3911 is a MODERATE (CVSS 4.2) misconfigured ip address field vulnerability (CWE-252: Unchecked Return Value) affecting Github.com/cloudflare/cfrpki libraries in the Go ecosystem. The issue involves misconfigured ip address field in roa leads to octorpki crash. Remediation is available by upgrading affected packages to version 1.4.0.

CVE-2021-3911 at a Glance

CVE Identifier CVE-2021-3911
GHSA Identifier GHSA-w6ww-fmfx-2x22
Severity MODERATE
CVSS v3.1 Base Score 4.2
CWE Classification CWE-252: Unchecked Return Value
Affected Product Github.com/cloudflare/cfrpki
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 4.2

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required High (PR:H)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2021-3911

To remediate this vulnerability, upgrade all affected Github.com/cloudflare/cfrpki dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/cloudflare/cfrpki fixed: 1.4.0 
Upgrade github.com/cloudflare/cfrpki to 1.4.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/cloudflare/cfrpki

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-3911, inspect your project dependencies for Github.com/cloudflare/cfrpki:

inspect dependencies for github.com/cloudflare/cfrpki

Analyze the terminal output to locate any version of Github.com/cloudflare/cfrpki in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.4.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-252: Unchecked Return Value, where the product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. In Github.com/cloudflare/cfrpki, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

If the ROA that a repository returns contains too many bits for the IP address then OctoRPKI will crash. ## Patches ## For more information If you have any questions or comments about this advisory email us at security@cloudflare.com

CVE-2021-3911 Affected Github.com/cloudflare/cfrpki Versions

1 component(s)
Fixed Versions:
1.4.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/cloudflare/cfrpki
golang/github.com/cloudflare/cfrpki
Go
< 1.4.0
1.4.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/cloudflare/cfrpki/security/advisories/GHSA-w6ww-fmfx-2x22
NVD — CVE-2021-3911 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3911
Security Fix Commit FIX COMMIT
https://github.com/cloudflare/cfrpki/commit/2882307febd66801de97b2a2ce4d93fe58132005
Github.com/cloudflare/cfrpki Source Repository REPOSITORY
https://github.com/cloudflare/cfrpki
pkg.go.dev/vuln/go-2022-0252 WEB
https://pkg.go.dev/vuln/GO-2022-0252
Github.com/cloudflare/cfrpki Security Information SECURITY
https://www.debian.org/security/2022/dsa-5041

Frequently Asked Questions

What is CVE-2021-3911?
CVE-2021-3911 is a security vulnerability in Github.com/cloudflare/cfrpki involving Misconfigured IP address field in ROA leads to OctoRPKI crash under CWE-252: Unchecked Return Value.
Which Github.com/cloudflare/cfrpki versions are affected?
Affected versions include releases prior to 1.4.0 across affected packages: github.com/cloudflare/cfrpki.
What version fixes CVE-2021-3911?
Upgrading to 1.4.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/cloudflare/cfrpki affected?
Yes, github.com/cloudflare/cfrpki is affected in releases prior to 1.4.0. Upgrade your dependency to 1.4.0 or later.
What is the CVSS score of CVE-2021-3911?
CVE-2021-3911 has a CVSS v3.1 base score of 4.2 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2021-3911?
CVE-2021-3911 is classified under CWE-252: Unchecked Return Value (The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.).
How can I check Go dependencies for CVE-2021-3911?
Run the dependency tree command: 'inspect dependencies for github.com/cloudflare/cfrpki'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w6ww-fmfx-2x22",
  "modified" : "2021-11-10T18:14:59Z",
  "published" : "2021-11-10T19:56:04Z",
  "aliases" : [ "CVE-2021-3911" ],
  "summary" : "Misconfigured IP address field in ROA leads to OctoRPKI crash",
  "details" : "If the ROA that a repository returns contains too many bits for the IP address then OctoRPKI will crash.\n\n## Patches\n\n## For more information\nIf you have any questions or comments about this advisory email us at security@cloudflare.com\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cloudflare/cfrpki"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.4.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/cfrpki/security/advisories/GHSA-w6ww-fmfx-2x22"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-3911"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/cfrpki/commit/2882307febd66801de97b2a2ce4d93fe58132005"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/cloudflare/cfrpki"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2022-0252"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2022/dsa-5041"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-252" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-11-10T18:14:59Z",
    "nvd_published_at" : "2021-11-11T22:15:00Z"
  }
}