[github.com/runatlantis/atlantis/server/controllers/events] Atlantis Events prior to 0.19.7 vulnerable to Timing Attack

The package github.com/runatlantis/atlantis/server/controllers/events before 0.19.7 are vulnerable to Timing Attack in the webhook event validator code, which does not use a constant-time comparison function to validate the webhook secret. It can allow an attacker to recover this secret as an attacker and then forge webhook events.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-24912
• https://github.com/runatlantis/atlantis/issues/2391
• https://github.com/runatlantis/atlantis/commit/48870911974adddaa4c99c8089e79b7d787fa820
• https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMRUNATLANTISATLANTISSERVERCONTROLLERSEVENTS-2950851
• https://github.com/advisories/GHSA-jxqv-jcvh-7gr4