CVE-2017-1000433: Pysaml2 Pysaml2 Improper Authentication Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-924m-4pmx-c67h
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CVSS 8.1
CWE-287
Published
Advisory Summary

CVE-2017-1000433 is a CRITICAL (CVSS 8.1) pysaml2 improper authentication vulnerability vulnerability (CWE-287: Improper Authentication) affecting Pysaml2 libraries in the PyPI ecosystem. The issue involves pysaml2 improper authentication vulnerability. Remediation is available by upgrading affected packages to version 4.5.0.

CVE-2017-1000433 at a Glance

CVE Identifier CVE-2017-1000433
GHSA Identifier GHSA-924m-4pmx-c67h
Severity CRITICAL
CVSS v3.1 Base Score 8.1
CWE Classification CWE-287: Improper Authentication
Affected Product Pysaml2
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2017-1000433

To remediate this vulnerability, upgrade all affected Pysaml2 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

pysaml2 fixed: 4.5.0 
pip install pysaml2>=4.5.0
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 pysaml2

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2017-1000433, inspect your installed packages using pip:

pip show pysaml2

Analyze the terminal output to locate any version of Pysaml2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.5.0), your application is affected.

Note: The pip show pysaml2 command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Pysaml2, 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

pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.

CVE-2017-1000433 Affected Pysaml2 Versions

1 component(s)
Fixed Versions:
4.5.0
Product / Package Ecosystem Affected Versions Fixed Version
pysaml2
pypi/pysaml2
PyPI
< 4.5.0
4.5.0

References

NVD — CVE-2017-1000433 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-1000433
Pysaml2 Source Repository REPOSITORY
https://github.com/rohe/pysaml2/issues/451
Pysaml2 Source Repository REPOSITORY
https://github.com/IdentityPython/pysaml2/pull/454
Security Fix Commit FIX COMMIT
https://github.com/IdentityPython/pysaml2/commit/6312a41e037954850867f29d329e5007df1424a5
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-924m-4pmx-c67h
Pysaml2 Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/pysaml2/PYSEC-2018-48.yaml
Pysaml2 Source Repository REPOSITORY
https://github.com/rohe/pysaml2
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2018/07/msg00000.html
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2021/02/msg00038.html
Pysaml2 Security Information SECURITY
https://security.gentoo.org/glsa/201801-11

Frequently Asked Questions

What is CVE-2017-1000433?
CVE-2017-1000433 is a security vulnerability in Pysaml2 involving pysaml2 Improper Authentication vulnerability under CWE-287: Improper Authentication.
Which Pysaml2 versions are affected?
Affected versions include releases prior to 4.5.0 across affected packages: pysaml2.
What version fixes CVE-2017-1000433?
Upgrading to 4.5.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pysaml2 affected?
Yes, pysaml2 is affected in releases prior to 4.5.0. Upgrade your dependency to 4.5.0 or later.
What is the CVSS score of CVE-2017-1000433?
CVE-2017-1000433 has a CVSS v3.1 base score of 8.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2017-1000433?
CVE-2017-1000433 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check PyPI dependencies for CVE-2017-1000433?
Run the dependency tree command: 'pip show pysaml2'. 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-924m-4pmx-c67h",
  "modified" : "2024-10-21T21:09:04Z",
  "published" : "2018-07-13T16:01:17Z",
  "aliases" : [ "CVE-2017-1000433" ],
  "summary" : "pysaml2 Improper Authentication vulnerability",
  "details" : "pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "pysaml2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.5.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-1000433"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rohe/pysaml2/issues/451"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/IdentityPython/pysaml2/pull/454"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/IdentityPython/pysaml2/commit/6312a41e037954850867f29d329e5007df1424a5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-924m-4pmx-c67h"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/pysaml2/PYSEC-2018-48.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/rohe/pysaml2"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2018/07/msg00000.html"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2021/02/msg00038.html"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/201801-11"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:27:01Z",
    "nvd_published_at" : "2018-01-02T23:29:00Z"
  }
}