CVE-2020-26172 : Vulnerability Insights and Analysis

Tangro Business Workflow before version 1.18.1 is susceptible to a security vulnerability that allows attackers to reuse JWT tokens during active sessions.

Understanding CVE-2020-26172

This CVE identifies a critical issue in Tangro Business Workflow that could compromise the security of user sessions.

What is CVE-2020-26172?

The vulnerability in Tangro Business Workflow allows the generation of identical JWT tokens for every login, enabling attackers to reuse these tokens while a session is active. Notably, the JWT tokens lack an expiration timestamp, exacerbating the risk of unauthorized access.

The Impact of CVE-2020-26172

The impact of this vulnerability is rated as MEDIUM severity with a CVSS base score of 4.2. The confidentiality and integrity of affected systems are at risk due to the potential token reuse by malicious actors.

Technical Details of CVE-2020-26172

Tangro Business Workflow's security flaw is detailed below.

Vulnerability Description

Every login operation generates the same JWT token, allowing for token reuse during active sessions.
Lack of an expiration timestamp on JWT tokens increases the risk of unauthorized access.

Affected Systems and Versions

Tangro Business Workflow versions before 1.18.1 are impacted by this vulnerability.

Exploitation Mechanism

Attack Complexity: HIGH
Attack Vector: NETWORK
User Interaction: REQUIRED
Privileges Required: NONE
Scope: UNCHANGED
Vector String: CVSS:3.1/AC:H/AV:N/A:N/C:L/I:L/PR:N/S:U/UI:R

Mitigation and Prevention

Protecting systems from CVE-2020-26172 requires immediate actions and long-term security practices.

Immediate Steps to Take

Upgrade Tangro Business Workflow to version 1.18.1 or newer to mitigate the vulnerability.
Monitor and invalidate active sessions to prevent token reuse.

Long-Term Security Practices

Implement regular security audits to identify and address vulnerabilities promptly.
Enforce strict token management policies to enhance session security.

Patching and Updates

Regularly apply security patches and updates provided by Tangro to address known vulnerabilities.