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Compromise of PHP's development team self-hosted Git server

PHP is a web development language primarily used for creating web applications. On March 28th, 2021, they reported [1] that the self-hosted Git server at git.php.net was compromised and included two commits with malicious intent to add backdoor capabilities.

Impact

  • Code changes in the form of two commits to the official and self-hosted Git server were made as if they were signed-off by PHP maintainers Rasmus Lerdorf and Nikita Popov.
  • Code changes were introducing a remote code execution backdoor to any PHP server built from the source-code that included these commits.

Remediation

  • Membership in the PHP GitHub organization now required 2FA-enabled accounts.
  • Write access to the repository's source migrated out of a self-built karma system and now restricted only to members of the PHP project's GitHub organization.
  • The PHP team has decided to stop maintaining their own infrastructure declared their GitHub PHP project repository as the primary source.

Type of Compromise

Source Code: Still unknown how the threat actors were able to gain access to the Git server, compromising the source code that powers 79.2% of all websites [2].

References

  1. PHP Security Update, <https://news-web.php.net/php.internals/113838>.
  2. 79.2% of all websites are powered by PHP, <https://w3techs.com/technologies/details/pl-php>.