CVE-2022-30034: Flower Authentication Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-q4qm-xhf9-4p8f
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CVSS 8.6
CWE-287
Published
Advisory Summary

CVE-2022-30034 is a HIGH (CVSS 8.6) authentication bypass vulnerability (CWE-287: Improper Authentication) affecting Flower libraries in the PyPI ecosystem. The issue involves flower oauth authentication bypass. Remediation is available by upgrading affected packages to version 1.2.0.

CVE-2022-30034 at a Glance

CVE Identifier CVE-2022-30034
GHSA Identifier GHSA-q4qm-xhf9-4p8f
Severity HIGH
CVSS v3.1 Base Score 8.6
CWE Classification CWE-287: Improper Authentication
Affected Product Flower
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.6

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

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

How to Fix CVE-2022-30034

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

flower fixed: 1.2.0 
pip install flower>=1.2.0
Verify Direct and Transitive Dependencies

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

pip show flower

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2022-30034, inspect your installed packages using pip:

pip show flower

Analyze the terminal output to locate any version of Flower in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.0), your application is affected.

Note: The pip show flower command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Flower, 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

All versions of Flower, a web UI for the Celery Python RPC framework, as of 05-02-2022 are vulnerable to an OAuth authentication bypass. An attacker could then access the Flower API to discover and invoke arbitrary Celery RPC calls or deny service by shutting down Celery task nodes. A fix was released in version 1.2.0.

CVE-2022-30034 Affected Flower Versions

1 component(s)
Fixed Versions:
1.2.0
Product / Package Ecosystem Affected Versions Fixed Version
flower
pypi/flower
PyPI
< 1.2.0
1.2.0

References

NVD — CVE-2022-30034 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-30034
Flower Source Repository REPOSITORY
https://github.com/mher/flower/issues/1217
Flower Source Repository REPOSITORY
https://github.com/mher/flower/pull/1216
Flower Source Repository REPOSITORY
https://github.com/mher/flower
Flower Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/flower/PYSEC-2022-42973.yaml
tprynn.github.io/2022/05/26/flower-v... WEB
https://tprynn.github.io/2022/05/26/flower-vulns.html
Flower Security Information SECURITY
http://githubcommherflower.com

Frequently Asked Questions

What is CVE-2022-30034?
CVE-2022-30034 is a security vulnerability in Flower involving Flower OAuth authentication bypass under CWE-287: Improper Authentication.
Which Flower versions are affected?
Affected versions include releases prior to 1.2.0 across affected packages: flower.
What version fixes CVE-2022-30034?
Upgrading to 1.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is flower affected?
Yes, flower is affected in releases prior to 1.2.0. Upgrade your dependency to 1.2.0 or later.
What is the CVSS score of CVE-2022-30034?
CVE-2022-30034 has a CVSS v3.1 base score of 8.6 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.
What CWE is associated with CVE-2022-30034?
CVE-2022-30034 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check PyPI dependencies for CVE-2022-30034?
Run the dependency tree command: 'pip show flower'. 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-q4qm-xhf9-4p8f",
  "modified" : "2024-09-20T20:09:21Z",
  "published" : "2022-06-03T00:01:07Z",
  "aliases" : [ "CVE-2022-30034" ],
  "summary" : "Flower OAuth authentication bypass",
  "details" : "All versions of Flower, a web UI for the Celery Python RPC framework, as of 05-02-2022 are vulnerable to an OAuth authentication bypass. An attacker could then access the Flower API to discover and invoke arbitrary Celery RPC calls or deny service by shutting down Celery task nodes. A fix was released in version 1.2.0.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "flower"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-30034"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mher/flower/issues/1217"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mher/flower/pull/1216"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mher/flower"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/flower/PYSEC-2022-42973.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://tprynn.github.io/2022/05/26/flower-vulns.html"
  }, {
    "type" : "WEB",
    "url" : "http://githubcommherflower.com"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-03T22:29:21Z",
    "nvd_published_at" : "2022-06-02T14:15:00Z"
  }
}