CVE-2022-26137 : Vulnerability Insights and Analysis

A comprehensive guide on CVE-2022-26137 affecting multiple Atlassian products.

Understanding CVE-2022-26137

In this section, we will delve into the details of the vulnerability and its impact on Atlassian products.

What is CVE-2022-26137?

CVE-2022-26137 is a vulnerability in multiple Atlassian products that allows a remote, unauthenticated attacker to cause additional Servlet Filters to be invoked, resulting in a Cross-origin resource sharing (CORS) bypass.

The Impact of CVE-2022-26137

The vulnerability can be exploited by sending a specially crafted HTTP request to access the vulnerable application with the victim's permissions. Atlassian Bamboo, Bitbucket, Confluence, Crowd, Fisheye, Crucible, Jira, and Jira Service Management are among the affected products.

Technical Details of CVE-2022-26137

Let's explore the technical aspects of the CVE-2022-26137 vulnerability.

Vulnerability Description

The vulnerability allows remote attackers to bypass CORS protection on the affected Atlassian products by manipulating Servlet Filters with crafted HTTP requests.

Affected Systems and Versions

Atlassian Bamboo versions before 8.0.9, between 8.1.0 and 8.1.8, and 8.2.0 before 8.2.4
Atlassian Bitbucket versions before 7.6.16, between 7.7.0 and 7.17.8, 7.18.0 before 7.19.5, 7.20.0 before 7.20.2, 7.21.0 before 7.21.2, and versions 8.0.0 and 8.1.0
Atlassian Confluence versions before 7.4.17, between 7.5.0 and 7.13.7, 7.14.0 before 7.14.3, 7.15.0 before 7.15.2, 7.16.0 before 7.16.4, 7.17.0 before 7.17.4, and version 7.21.0
Atlassian Crowd versions before 4.3.8, between 4.4.0 and 4.4.2, and version 5.0.0
Atlassian Fisheye and Crucible versions before 4.8.10
Atlassian Jira versions before 8.13.22, between 8.14.0 and 8.20.10, and 8.21.0 before 8.22.4
Atlassian Jira Service Management versions before 4.13.22, between 4.14.0 and 4.20.10, and 4.21.0 before 4.22.4

Exploitation Mechanism

The vulnerability can be exploited by tricking a user into requesting a malicious URL, allowing the attacker to access the application with unauthorized permissions.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-26137, follow these steps.

Immediate Steps to Take

Update the affected Atlassian products to the fixed versions provided by the vendor.
Implement proper access controls and security measures to prevent unauthorized access.
Educate users about phishing attacks and malicious URLs to prevent exploitation.

Long-Term Security Practices

Regularly update and patch software to the latest versions.
Monitor for any unauthorized access or suspicious activities on the network.
Conduct security assessments and audits to identify and address vulnerabilities proactively.

Patching and Updates

Atlassian has released patches to address the CVE-2022-26137 vulnerability. Ensure you apply the latest updates to all affected products to mitigate the risk of exploitation.