Vulnerabilities in pkg:pypi/colander

PACKAGE
Advisory Identifier: GHSA-rv95-4wxj-6fqq
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Advisory Summary

CVE-2017-18361 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')) affecting Colander libraries in the PyPI ecosystem. The issue involves pylons colander denial of service vulnerability. Remediation is available by upgrading affected packages to version 1.7.0.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:pypi/colander

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:pypi/colander. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-rv95-4wxj-6fqq CVE-2017-18361 HIGH Pylons Colander Denial of Service vulnerability

CVE-2017-18361 at a Glance

CVE Identifier CVE-2017-18361
GHSA Identifier GHSA-rv95-4wxj-6fqq
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Product Colander
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:3.0/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-2017-18361

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

colander fixed: 1.7.0 
pip install colander>=1.7.0
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 colander

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2017-18361, inspect your installed packages using pip:

pip show colander

Analyze the terminal output to locate any version of Colander in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.7.0), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop'), where the product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. In Colander, 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

In Pylons Colander through 1.6, the URL validator allows an attacker to potentially cause an infinite loop thereby causing a denial of service via an unclosed parenthesis.

CVE-2017-18361 Affected Colander Versions

1 component(s)
Fixed Versions:
1.7.0
Product / Package Ecosystem Affected Versions Fixed Version
colander
pypi/colander
PyPI
< 1.7.0
1.7.0

References

NVD — CVE-2017-18361 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-18361
Colander Source Repository REPOSITORY
https://github.com/Pylons/colander/issues/290
Colander Source Repository REPOSITORY
https://github.com/Pylons/colander/pull/323
Security Fix Commit FIX COMMIT
https://github.com/Pylons/colander/commit/98805557c10ab5ff3016ed09aa2d48c49b9df40b
Colander Source Repository REPOSITORY
https://github.com/Pylons/colander
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-rv95-4wxj-6fqq
Colander Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/colander/PYSEC-2019-167.yaml

Frequently Asked Questions

What is CVE-2017-18361?
CVE-2017-18361 is a security vulnerability in Colander involving Pylons Colander Denial of Service vulnerability under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop').
Which Colander versions are affected?
Affected versions include releases prior to 1.7.0 across affected packages: colander.
What version fixes CVE-2017-18361?
Upgrading to 1.7.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is colander affected?
Yes, colander is affected in releases prior to 1.7.0. Upgrade your dependency to 1.7.0 or later.
What is the CVSS score of CVE-2017-18361?
CVE-2017-18361 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2017-18361?
CVE-2017-18361 is classified under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') (The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.).
How can I check PyPI dependencies for CVE-2017-18361?
Run the dependency tree command: 'pip show colander'. 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-rv95-4wxj-6fqq",
  "modified" : "2024-09-13T14:26:33Z",
  "published" : "2019-02-07T18:18:22Z",
  "aliases" : [ "CVE-2017-18361" ],
  "summary" : "Pylons Colander Denial of Service vulnerability",
  "details" : "In Pylons Colander through 1.6, the URL validator allows an attacker to potentially cause an infinite loop thereby causing a denial of service via an unclosed parenthesis.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/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" : "colander"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.7.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-18361"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Pylons/colander/issues/290"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Pylons/colander/pull/323"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Pylons/colander/commit/98805557c10ab5ff3016ed09aa2d48c49b9df40b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Pylons/colander"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-rv95-4wxj-6fqq"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/colander/PYSEC-2019-167.yaml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:55:55Z",
    "nvd_published_at" : null
  }
}