CVE-2018-1000809: PrivacyIDEA PrivacyIDEA Improper Input Validation Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-7qqv-r2q4-jxhm
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CVSS 7.5
CWE-20
Published
Advisory Summary

CVE-2018-1000809 is a HIGH (CVSS 7.5) privacyidea improper input validation vulnerability vulnerability (CWE-20: Improper Input Validation) affecting PrivacyIDEA libraries in the PyPI ecosystem. The issue involves privacyidea improper input validation vulnerability. Remediation is available by upgrading affected packages to version 2.23.2.

CVE-2018-1000809 at a Glance

CVE Identifier CVE-2018-1000809
GHSA Identifier GHSA-7qqv-r2q4-jxhm
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-20: Improper Input Validation
Affected Product PrivacyIDEA
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-2018-1000809

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

privacyIDEA fixed: 2.23.2 
pip install privacyIDEA>=2.23.2
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 privacyIDEA

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2018-1000809, inspect your installed packages using pip:

pip show privacyIDEA

Analyze the terminal output to locate any version of PrivacyIDEA in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.23.2), your application is affected.

Note: The pip show privacyIDEA 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 PrivacyIDEA, 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

privacyIDEA version 2.23.1 and earlier contains a Improper Input Validation vulnerability in token validation api that can result in Denial-of-Service. This attack appear to be exploitable via http request with user=<space>&pass= to /validate/check url. This vulnerability appears to have been fixed in 2.23.2.

CVE-2018-1000809 Affected PrivacyIDEA Versions

1 component(s)
Fixed Versions:
2.23.2
Product / Package Ecosystem Affected Versions Fixed Version
privacyIDEA
pypi/privacyIDEA
PyPI
< 2.23.2
2.23.2

References

NVD — CVE-2018-1000809 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1000809
PrivacyIDEA Source Repository REPOSITORY
https://github.com/privacyidea/privacyidea/issues/1227
Security Fix Commit FIX COMMIT
https://github.com/privacyidea/privacyidea/commit/a3edc09beffa2104f357fe24971ea3211ce40751
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-7qqv-r2q4-jxhm
PrivacyIDEA Source Repository REPOSITORY
https://github.com/privacyidea/privacyidea
PrivacyIDEA Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/privacyidea/PYSEC-2018-20.yaml

Frequently Asked Questions

What is CVE-2018-1000809?
CVE-2018-1000809 is a security vulnerability in PrivacyIDEA involving privacyIDEA Improper Input Validation vulnerability under CWE-20: Improper Input Validation.
Which PrivacyIDEA versions are affected?
Affected versions include releases prior to 2.23.2 across affected packages: privacyIDEA.
What version fixes CVE-2018-1000809?
Upgrading to 2.23.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is privacyIDEA affected?
Yes, privacyIDEA is affected in releases prior to 2.23.2. Upgrade your dependency to 2.23.2 or later.
What is the CVSS score of CVE-2018-1000809?
CVE-2018-1000809 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-2018-1000809?
CVE-2018-1000809 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-2018-1000809?
Run the dependency tree command: 'pip show privacyIDEA'. 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-7qqv-r2q4-jxhm",
  "modified" : "2024-10-18T21:59:13Z",
  "published" : "2019-01-14T16:19:31Z",
  "aliases" : [ "CVE-2018-1000809" ],
  "summary" : "privacyIDEA Improper Input Validation vulnerability",
  "details" : "privacyIDEA version 2.23.1 and earlier contains a Improper Input Validation vulnerability in token validation api that can result in Denial-of-Service. This attack appear to be exploitable via http request with user=<space>&pass= to /validate/check url. This vulnerability appears to have been fixed in 2.23.2.",
  "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" : "privacyIDEA"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.23.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000809"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/privacyidea/privacyidea/issues/1227"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/privacyidea/privacyidea/commit/a3edc09beffa2104f357fe24971ea3211ce40751"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-7qqv-r2q4-jxhm"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/privacyidea/privacyidea"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/privacyidea/PYSEC-2018-20.yaml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:23:21Z",
    "nvd_published_at" : null
  }
}