cb9c65af43
`LDAPRoleManager` interpolated usernames directly into `ldap_url_template`,
allowing LDAP filter injection and URL structure manipulation via crafted
usernames.
This PR adds two layers of encoding when substituting `{USER}`:
1. **RFC 4515 filter escaping** — neutralises `*`, `(`, `)`, `\`, NUL
2. **URL percent-encoding** — prevents `%`, `?`, `#` from breaking
`ldap_url_parse`'s component splitting or undoing the filter escaping
It also adds `validate_query_template()` at startup to reject templates
that place `{USER}` outside the filter component (e.g. in the host or
base DN), where filter escaping would be the wrong defense.
Fixes: SCYLLADB-1309
Compatibility note:
Templates with `{USER}` in the host, base DN, attributes, or extensions
were previously silently accepted. They are now rejected at startup with
a descriptive error. Only templates with `{USER}` in the filter component
(after the third `?`) are valid.
Fixes: SCYLLADB-1309
Due to severeness, should be backported to all maintained versions.
Closes scylladb/scylladb#29388
* github.com:scylladb/scylladb:
auth: sanitize {USER} substitution in LDAP URL templates
test/ldap: add LDAP filter-injection reproducers
(cherry picked from commit aecb6b1d76)
Closes scylladb/scylladb#29495
ScyllaDB Documentation
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---------------------- Prerequisites ----------------------
Building User Documentation
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