Privilege Escalation to Root SSH Access via Pre-Receive Hook Environment in GitHub Enterprise Server

Summary

An attacker with an Administrator role in GitHub Enterprise Server could gain SSH root access via remote code execution. This vulnerability affected GitHub Enterprise Server version 3.8.0 and above and was fixed in version 3.8.17, 3.9.12, 3.10.9, 3.11.7 and 3.12.1. This vulnerability was reported via the GitHub Bug Bounty program.