This High severity File Inclusion vulnerability was introduced in versions 5.15.2, 5.16.1, 5.17.0, 10.0.0, 10.1.2, 10.2.0, 10.3.0, 10.4.0, 10.5.0, 10.6.0, 10.7.1, 11.0.0, 11.1.0, 11.2.0, and 11.3.0 of Jira Service Management Data Center.

This File Inclusion vulnerability, with a CVSS Score of 7.1 and a CVSS Vector of CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N allows an unauthenticated attacker to get the application to display the contents of a local file, or execute a different files already stored locally on the server which has high impact to confidentiality, high impact to integrity, no impact to availability, and requires user interaction.

Atlassian recommends that Jira Service Management Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:

• Jira Service Management Data Center 11.3: Upgrade to a release greater than or equal to 11.3.5
• Jira Service Management Data Center 10.3: Upgrade to a release greater than or equal to 10.3.18

See the release notes (https://confluence.atlassian.com/servicemanagement/jira-service-management-release-notes-780083086.html). You can download the latest version of Jira Service Management Data Center from the download center (https://www.atlassian.com/software/jira/service-management/download-archives).

The National Vulnerability Database provides the following description for this vulnerability: node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.