ikiwiki 3.20161219 does not properly check if a revision changes the access permissions for a page on sites with the git and recentchanges plugins and the CGI interface enabled, which allows remote attackers to revert certain changes by leveraging permissions to change the page before the revision was made.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ikiwiki | Ikiwiki | 3.20161219 (including) | 3.20161219 (including) |
| Ikiwiki | Ubuntu | esm-apps/xenial | * |
| Ikiwiki | Ubuntu | precise | * |
| Ikiwiki | Ubuntu | trusty | * |
| Ikiwiki | Ubuntu | upstream | * |
| Ikiwiki | Ubuntu | xenial | * |
| Ikiwiki | Ubuntu | yakkety | * |
Access control involves the use of several protection mechanisms such as:
When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: