CVE-2022-26134 vulnerability in Atlassian Products
Published on June 3, 2022

In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are from 1.3.0 before 7.4.17, from 7.13.0 before 7.13.7, from 7.14.0 before 7.14.3, from 7.15.0 before 7.15.2, from 7.16.0 before 7.16.4, from 7.17.0 before 7.17.4, and from 7.18.0 before 7.18.1.

Vendor Advisory NVD

Known Exploited Vulnerability

This Confluence Server and Data Center Remote Code Execution Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Versions of Confluence Server and Data Center contain a remote code execution vulnerability that allow for an unauthenticated attacker to perform arbitrary code execution.

The following remediation steps are recommended / required by June 3, 2022: Immediately block all internet traffic to and from Atlassian's Confluence Server and Data Center products until an update is available and successfully applied.

Vulnerability Analysis

CVE-2022-26134 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.

What is an Injection Vulnerability?

The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Software has certain assumptions about what constitutes data and control respectively. It is the lack of verification of these assumptions for user-controlled input that leads to injection problems. Injection problems encompass a wide variety of issues -- all mitigated in very different ways and usually attempted in order to alter the control flow of the process. For this reason, the most effective way to discuss these weaknesses is to note the distinct features which classify them as injection weaknesses. The most important issue to note is that all injection problems share one thing in common -- i.e., they allow for the injection of control plane data into the user-controlled data plane. This means that the execution of the process may be altered by sending code in through legitimate data channels, using no other mechanism. While buffer overflows, and many other flaws, involve the use of some further issue to gain execution, injection problems need only for the data to be parsed. The most classic instantiations of this category of weakness are SQL injection and format string vulnerabilities.

CVE-2022-26134 has been classified to as an Injection vulnerability or weakness.

Products Associated with CVE-2022-26134

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Atlassian Confluence Data Center

Atlassian Confluence Server

What versions are vulnerable to CVE-2022-26134?