A Bugzilla Security Advisory reports:
The following security issues have been discovered in
Bugzilla:
- Account Impersonation:
When a user creates a new account, Bugzilla doesn't correctly
reject email addresses containing non-ASCII characters, which
could be used to impersonate another user account. Such email
addresses could look visually identical to other valid email
addresses, and an attacker could try to confuse other users
and be added to bugs he shouldn't have access to.
- Cross-Site Request Forgery:
Due to a lack of validation of the Content-Type head when
making POST requests to jsonrpc.cgi, a possible CSRF
vulnerability was discovered. If a user visits an HTML page
with some malicious JS code in it, an attacker could make
changes to a remote Bugzilla installation on behalf of the
victim's account by using the JSON-RPC API. The user would
have had to be already logged in to the target site for the
vulnerability to work.
All affected installations are encouraged to upgrade as soon as
possible.