VDB-111245 · CVE-2017-1000433 · USN-3520-1

PySAML2 up to 4.4.0 Python Optimization Empty credentials management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in PySAML2 up to 4.4.0. This affects an unknown part of the component Python Optimization. The manipulation leads to credentials management (Empty). This vulnerability is referenced as CVE-2017-1000433. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in PySAML2 up to 4.4.0 and classified as critical. This issue affects an unknown functionality of the component Python Optimization. The manipulation with an unknown input leads to a credentials management vulnerability (Empty). Using CWE to declare the problem leads to CWE-255. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The bug was discovered 09/09/2017. The weakness was published 01/02/2018 (GitHub Repository). The advisory is shared at github.com. The identification of this vulnerability is CVE-2017-1000433 since 01/02/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1552 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 115 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 105688 (Ubuntu 16.04 LTS / 17.04 / 17.10 : python-pysaml2 vulnerability (USN-3520-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197010 (Ubuntu Security Notification for Python-pysaml2 Vulnerability (USN-3520-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 6 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (105688). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

PySAML2

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Empty
Class: Credentials management / Empty
CWE: CWE-255
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 105688
Nessus Name: Ubuntu 16.04 LTS / 17.04 / 17.10 : python-pysaml2 vulnerability (USN-3520-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

09/09/2017 🔍
01/02/2018 +115 days 🔍
01/02/2018 +0 days 🔍
01/02/2018 +0 days 🔍
01/03/2018 +1 days 🔍
01/08/2018 +5 days 🔍
01/09/2018 +1 days 🔍
01/19/2023 +1836 days 🔍