CVE-2022-3371: Rdiffweb Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-3fhq-72hw-jqwv
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CVSS 7.5
CWE-770
Published
Advisory Summary

CVE-2022-3371 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Rdiffweb libraries in the PyPI ecosystem. The issue involves rdiffweb's lack of token name length limit can result in dos or memory corruption. Remediation is available by upgrading affected packages to version 2.5.0a3.

CVE-2022-3371 at a Glance

CVE Identifier CVE-2022-3371
GHSA Identifier GHSA-3fhq-72hw-jqwv
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
Affected Product Rdiffweb
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/I:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2022-3371

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

rdiffweb fixed: 2.5.0a3 
pip install rdiffweb>=2.5.0a3
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 rdiffweb

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2022-3371, inspect your installed packages using pip:

pip show rdiffweb

Analyze the terminal output to locate any version of Rdiffweb in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.5.0a3), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Rdiffweb, 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

rdiffweb prior to 2.5.0a3 is vulnerable to Allocation of Resources Without Limits or Throttling. A lack of limit in the length of the `Token name` parameter can result in denial of service or memory corruption. Version 2.5.0a3 fixes this issue.

CVE-2022-3371 Affected Rdiffweb Versions

1 component(s)
Fixed Versions:
2.5.0a3
Product / Package Ecosystem Affected Versions Fixed Version
rdiffweb
pypi/rdiffweb
PyPI
< 2.5.0a3
2.5.0a3

References

NVD — CVE-2022-3371 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-3371
Security Fix Commit FIX COMMIT
https://github.com/ikus060/rdiffweb/commit/b62c479ff6979563c7c23e7182942bc4f460a2c7
Rdiffweb Source Repository REPOSITORY
https://github.com/ikus060/rdiffweb
Rdiffweb Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/rdiffweb/PYSEC-2022-299.yaml
huntr.dev/bounties/4e8f6136-5... WEB
https://huntr.dev/bounties/4e8f6136-50c7-4fa1-ac98-699bcb7b35ce

Frequently Asked Questions

What is CVE-2022-3371?
CVE-2022-3371 is a security vulnerability in Rdiffweb involving rdiffweb's lack of token name length limit can result in DoS or memory corruption under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Rdiffweb versions are affected?
Affected versions include releases prior to 2.5.0a3 across affected packages: rdiffweb.
What version fixes CVE-2022-3371?
Upgrading to 2.5.0a3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is rdiffweb affected?
Yes, rdiffweb is affected in releases prior to 2.5.0a3. Upgrade your dependency to 2.5.0a3 or later.
What is the CVSS score of CVE-2022-3371?
CVE-2022-3371 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2022-3371?
CVE-2022-3371 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check PyPI dependencies for CVE-2022-3371?
Run the dependency tree command: 'pip show rdiffweb'. 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-3fhq-72hw-jqwv",
  "modified" : "2024-10-25T21:39:31Z",
  "published" : "2022-10-01T00:00:21Z",
  "aliases" : [ "CVE-2022-3371" ],
  "summary" : "rdiffweb's lack of token name length limit can result in DoS or memory corruption",
  "details" : "rdiffweb prior to 2.5.0a3 is vulnerable to Allocation of Resources Without Limits or Throttling. A lack of limit in the length of the `Token name` parameter can result in denial of service or memory corruption. Version 2.5.0a3 fixes this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "rdiffweb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.5.0a3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-3371"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ikus060/rdiffweb/commit/b62c479ff6979563c7c23e7182942bc4f460a2c7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ikus060/rdiffweb"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/rdiffweb/PYSEC-2022-299.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.dev/bounties/4e8f6136-50c7-4fa1-ac98-699bcb7b35ce"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-10-03T22:19:03Z",
    "nvd_published_at" : "2022-09-30T14:15:00Z"
  }
}