Executive Summary

Summary
Title PySAML2: Security bypass
Informations
Name GLSA-201801-11 First vendor Publication 2018-01-11
Vendor Gentoo Last vendor Modification 2018-01-11
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 6.8 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

A vulnerability in PySAML2 might allow remote attackers to bypass authentication.

Background

PySAML2 is a pure python implementation of SAML2

Description

It was found that the PySAML2 relies on an assert statement to check the user's password. A python optimizations might remove this assertion.

Impact

A remote attacker could bypass security restrictions and access any application which is using PySAML2 for authentication.

Workaround

Disable python optimizations.

Resolution

All PySAML2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-python/pysaml2-4.5.0"

References

[ 1 ] CVE-2017-1000433 : http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-1000433

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

https://security.gentoo.org/glsa/201801-11

Original Source

Url : http://security.gentoo.org/glsa/glsa-201801-11.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-287 Improper Authentication

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 2
Os 2

Nessus® Vulnerability Scanner

Date Description
2018-07-02 Name : The remote Debian host is missing a security update.
File : debian_DLA-1410.nasl - Type : ACT_GATHER_INFO
2018-01-12 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201801-11.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2018-01-17 21:24:16
  • Multiple Updates
2018-01-12 00:20:34
  • First insertion