Add three new rules based on past S1 incidents
This MR adds 3 new rules based on past S1 incidents, as part of https://gitlab.com/gitlab-com/gl-security/product-security/appsec/appsec-team/-/issues/620+.
The CVEs covered are:
/cc @gitlab-com/gl-security/product-security/appsec for review
Edited by Ameya Darshan