CVE-2017-7235: Cfscrape Cfscrape Improper Input Validation Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-5mc5-5j6c-qmf9
Share
CVSS 8.8
CWE-20
Published
Advisory Summary

CVE-2017-7235 is a HIGH (CVSS 8.8) cfscrape improper input validation vulnerability vulnerability (CWE-20: Improper Input Validation) affecting Cfscrape libraries in the PyPI ecosystem. The issue involves cfscrape improper input validation vulnerability. Remediation is available by upgrading affected packages to version 1.8.0.

CVE-2017-7235 at a Glance

CVE Identifier CVE-2017-7235
GHSA Identifier GHSA-5mc5-5j6c-qmf9
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-20: Improper Input Validation
Affected Product Cfscrape
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2017-7235

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

cfscrape fixed: 1.8.0 
pip install cfscrape>=1.8.0
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 cfscrape

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2017-7235, inspect your installed packages using pip:

pip show cfscrape

Analyze the terminal output to locate any version of Cfscrape in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.8.0), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Cfscrape, 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

An issue was discovered in cloudflare-scrape 1.6.6 through 1.7.1. A malicious website owner could craft a page that executes arbitrary Python code against any cfscrape user who scrapes that website. This is fixed in 1.8.0.

CVE-2017-7235 Affected Cfscrape Versions

1 component(s)
Fixed Versions:
1.8.0
Product / Package Ecosystem Affected Versions Fixed Version
cfscrape
pypi/cfscrape
PyPI
≥ 1.6.6
< 1.8.0
1.8.0

References

NVD — CVE-2017-7235 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-7235
Cfscrape Source Repository REPOSITORY
https://github.com/Anorov/cloudflare-scrape/issues/97
Cfscrape Source Repository REPOSITORY
https://github.com/Anorov/cloudflare-scrape
Cfscrape Release RELEASE
https://github.com/Anorov/cloudflare-scrape/releases/tag/1.8.0
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-5mc5-5j6c-qmf9
Cfscrape Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/cfscrape/PYSEC-2017-7.yaml
Cfscrape Security Information SECURITY
https://web.archive.org/web/20170701161512/http://www.securityfocus.com/bid/97191

Frequently Asked Questions

What is CVE-2017-7235?
CVE-2017-7235 is a security vulnerability in Cfscrape involving cfscrape Improper Input Validation vulnerability under CWE-20: Improper Input Validation.
Which Cfscrape versions are affected?
Affected versions include releases prior to 1.8.0 across affected packages: cfscrape.
What version fixes CVE-2017-7235?
Upgrading to 1.8.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is cfscrape affected?
Yes, cfscrape is affected in releases prior to 1.8.0. Upgrade your dependency to 1.8.0 or later.
What is the CVSS score of CVE-2017-7235?
CVE-2017-7235 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2017-7235?
CVE-2017-7235 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check PyPI dependencies for CVE-2017-7235?
Run the dependency tree command: 'pip show cfscrape'. 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-5mc5-5j6c-qmf9",
  "modified" : "2024-09-13T14:35:01Z",
  "published" : "2018-07-13T16:01:01Z",
  "aliases" : [ "CVE-2017-7235" ],
  "summary" : "cfscrape Improper Input Validation vulnerability",
  "details" : "An issue was discovered in cloudflare-scrape 1.6.6 through 1.7.1. A malicious website owner could craft a page that executes arbitrary Python code against any cfscrape user who scrapes that website. This is fixed in 1.8.0.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "cfscrape"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.6.6"
      }, {
        "fixed" : "1.8.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.7.1"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-7235"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Anorov/cloudflare-scrape/issues/97"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Anorov/cloudflare-scrape"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Anorov/cloudflare-scrape/releases/tag/1.8.0"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-5mc5-5j6c-qmf9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/cfscrape/PYSEC-2017-7.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20170701161512/http://www.securityfocus.com/bid/97191"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:16:39Z",
    "nvd_published_at" : null
  }
}