CVE-2022-3295: Rdiffweb Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-hrj7-f62f-j7x7
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CVSS 7.5
CWE-770
Published
Advisory Summary

CVE-2022-3295 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 allows unlimited length of root directory name, which could result in dos. Remediation is available by upgrading affected packages to version 2.4.8.

CVE-2022-3295 at a Glance

CVE Identifier CVE-2022-3295
GHSA Identifier GHSA-hrj7-f62f-j7x7
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-2022-3295

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: 2.4.8 
pip install rdiffweb>=2.4.8
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-2022-3295, 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 2.4.8), 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 2.4.8 has no limit in length of root directory names. Allowing users to enter long strings may result in a DOS attack or memory corruption. Version 2.4.8 defines a field limit for username, email, and root directory.

CVE-2022-3295 Affected Rdiffweb Versions

1 component(s)
Fixed Versions:
2.4.8
Product / Package Ecosystem Affected Versions Fixed Version
rdiffweb
pypi/rdiffweb
PyPI
< 2.4.8
2.4.8

References

Rdiffweb Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/rdiffweb/PYSEC-2022-293.yaml
NVD — CVE-2022-3295 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-3295
Security Fix Commit FIX COMMIT
https://github.com/ikus060/rdiffweb/commit/667657c6fe2b336c90be37f37fb92f65df4feee3
Rdiffweb Source Repository REPOSITORY
https://github.com/ikus060/rdiffweb
huntr.dev/bounties/202dd03a-3... WEB
https://huntr.dev/bounties/202dd03a-3d97-4c64-bc73-1a0f36614233

Frequently Asked Questions

What is CVE-2022-3295?
CVE-2022-3295 is a security vulnerability in Rdiffweb involving rdiffweb allows unlimited length of root directory name, which could result in DoS under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Rdiffweb versions are affected?
Affected versions include releases prior to 2.4.8 across affected packages: rdiffweb.
What version fixes CVE-2022-3295?
Upgrading to 2.4.8 (or the latest patched release for your respective branch) resolves the vulnerability.
Is rdiffweb affected?
Yes, rdiffweb is affected in releases prior to 2.4.8. Upgrade your dependency to 2.4.8 or later.
What is the CVSS score of CVE-2022-3295?
CVE-2022-3295 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-2022-3295?
CVE-2022-3295 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-2022-3295?
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-hrj7-f62f-j7x7",
  "modified" : "2024-10-25T21:29:32Z",
  "published" : "2022-09-27T00:00:22Z",
  "aliases" : [ "CVE-2022-3295" ],
  "summary" : "rdiffweb allows unlimited length of root directory name, which could result in DoS",
  "details" : "rdiffweb prior to 2.4.8 has no limit in length of root directory names. Allowing users to enter long strings may result in a DOS attack or memory corruption. Version 2.4.8 defines a field limit for username, email, and root directory.",
  "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" : "2.4.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-3295"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ikus060/rdiffweb/commit/667657c6fe2b336c90be37f37fb92f65df4feee3"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ikus060/rdiffweb"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/rdiffweb/PYSEC-2022-293.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.dev/bounties/202dd03a-3d97-4c64-bc73-1a0f36614233"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-09-30T04:41:04Z",
    "nvd_published_at" : "2022-09-26T13:15:00Z"
  }
}