CVE-2021-26074 : Exploit Details and Defense Strategies

A detailed overview of CVE-2021-26074, a vulnerability related to Broken Authentication in Atlassian Connect Spring Boot (ACSB).

Understanding CVE-2021-26074

This section delves into the particulars of the CVE-2021-26074 vulnerability affecting Atlassian Connect Spring Boot (ACSB) software.

What is CVE-2021-26074?

The CVE-2021-26074 vulnerability pertains to Broken Authentication in Atlassian Connect Spring Boot (ACSB) versions 1.1.0 through 2.1.3. It allows an attacker to send authenticated re-installation events to an app.

The Impact of CVE-2021-26074

The impact of CVE-2021-26074 is significant as it enables attackers to exploit authentication vulnerabilities, potentially compromising the security of Atlassian Connect Spring Boot (ACSB) applications.

Technical Details of CVE-2021-26074

This section outlines the technical details of CVE-2021-26074, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in Atlassian Connect Spring Boot (ACSB) incorrectly accepts context JWTs in lifecycle endpoints, allowing attackers to send authenticated re-installation events.

Affected Systems and Versions

Atlassian Connect Spring Boot (ACSB) versions 1.1.0 through 2.1.3 are affected by this vulnerability, specifically where context JWTs are erroneously accepted in place of server-to-server JWTs.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending authenticated re-installation events to an app due to the improper acceptance of context JWTs in lifecycle endpoints.

Mitigation and Prevention

Learn about the measures to mitigate and prevent the exploitation of CVE-2021-26074 to enhance the security of affected systems.

Immediate Steps to Take

Immediate steps to secure systems include updating Atlassian Connect Spring Boot (ACSB) versions to avoid accepting unauthorized context JWTs.

Long-Term Security Practices

Incorporate robust security practices, such as regularly updating software and implementing secure authentication protocols, to prevent similar vulnerabilities.

Patching and Updates

Ensure prompt installation of patches and updates provided by Atlassian to address the Broken Authentication vulnerability in Atlassian Connect Spring Boot (ACSB).