CVE-2017-1000246: Pysaml2 Pysaml2 Improperly Initializes Encryption Vector Vulnerability

MODERATE
Advisory Identifier: GHSA-cq94-qf6q-mf2h
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CVSS 5.3
CWE-330
Published
Advisory Summary

CVE-2017-1000246 is a MODERATE (CVSS 5.3) pysaml2 improperly initializes encryption vector vulnerability (CWE-330: Use of Insufficiently Random Values) affecting Pysaml2 libraries in the PyPI ecosystem. The issue involves pysaml2 improperly initializes encryption vector. Remediation is available by upgrading affected packages to version 4.6.0.

CVE-2017-1000246 at a Glance

CVE Identifier CVE-2017-1000246
GHSA Identifier GHSA-cq94-qf6q-mf2h
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-330: Use of Insufficiently Random Values
Affected Product Pysaml2
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:L/I:N/A:N).

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 Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2017-1000246

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: 4.6.0 
pip install pysaml2>=4.6.0
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-2017-1000246, 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 4.6.0), 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-330: Use of Insufficiently Random Values, where the product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. 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

Python package pysaml2 version 4.5.0 and earlier reuses the initialization vector across encryptions in the IDP server, resulting in weak encryption of data.

CVE-2017-1000246 Affected Pysaml2 Versions

1 component(s)
Fixed Versions:
4.6.0
Product / Package Ecosystem Affected Versions Fixed Version
pysaml2
pypi/pysaml2
PyPI
< 4.6.0
4.6.0

References

NVD — CVE-2017-1000246 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-1000246
Pysaml2 Source Repository REPOSITORY
https://github.com/rohe/pysaml2/issues/417
Pysaml2 Source Repository REPOSITORY
https://github.com/IdentityPython/pysaml2/pull/519/commits/7323f5c20efb59424d853c822e7a26d1aa3e84aa
Pysaml2 Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/pysaml2/PYSEC-2017-26.yaml
Pysaml2 Source Repository REPOSITORY
https://github.com/rohe/pysaml2

Frequently Asked Questions

What is CVE-2017-1000246?
CVE-2017-1000246 is a security vulnerability in Pysaml2 involving Pysaml2 improperly initializes encryption vector under CWE-330: Use of Insufficiently Random Values.
Which Pysaml2 versions are affected?
Affected versions include releases prior to 4.6.0 across affected packages: pysaml2.
What version fixes CVE-2017-1000246?
Upgrading to 4.6.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pysaml2 affected?
Yes, pysaml2 is affected in releases prior to 4.6.0. Upgrade your dependency to 4.6.0 or later.
What is the CVSS score of CVE-2017-1000246?
CVE-2017-1000246 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2017-1000246?
CVE-2017-1000246 is classified under CWE-330: Use of Insufficiently Random Values (The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.).
How can I check PyPI dependencies for CVE-2017-1000246?
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-cq94-qf6q-mf2h",
  "modified" : "2024-10-14T15:36:52Z",
  "published" : "2018-07-16T16:50:30Z",
  "aliases" : [ "CVE-2017-1000246" ],
  "summary" : "Pysaml2 improperly initializes encryption vector",
  "details" : "Python package pysaml2 version 4.5.0 and earlier reuses the initialization vector across encryptions in the IDP server, resulting in weak encryption of data.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "pysaml2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.6.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-1000246"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rohe/pysaml2/issues/417"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/IdentityPython/pysaml2/pull/519/commits/7323f5c20efb59424d853c822e7a26d1aa3e84aa"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/pysaml2/PYSEC-2017-26.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/rohe/pysaml2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-330" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:32:20Z",
    "nvd_published_at" : null
  }
}