[SSO] Fix OIDC group sync privilege escalation via case folding#36509
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mtabebe wants to merge 1 commit into
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[SSO] Fix OIDC group sync privilege escalation via case folding#36509mtabebe wants to merge 1 commit into
mtabebe wants to merge 1 commit into
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Problem: JWT group names were lowercased before catalog lookup. When two roles differ only by case (e.g. `admin` and `"Admin"`), the lowercase map built by `roles_by_lowercase_name` silently picked the wrong role due to BTreeMap last-writer-wins semantics. Solution: - remove `to_lowercase()` from group extraction, replace the lowercase-map lookup in `sync_jwt_groups` with exact `try_get_role_by_name`, - delete the now-unused `roles_by_lowercase_name` and `try_get_role_by_name_case_insensitive` methods Testing: - updated three oidc.rs unit tests - added mzcompose workflow `oidc_group_sync_case_sensitive` with an OIDC mock server to verify "Admin" cannot escalate to the `admin` role
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SangJunBak
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May 11, 2026
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| // Check case-insensitively so "MZ_SYSTEM" is also blocked. | ||
| if catalog::is_reserved_role_name(&group.to_lowercase()) { |
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I wonder if we need to check this case? Thinking the "No matching Materialize Role" warning is fine
SangJunBak
reviewed
May 11, 2026
| let groups: Vec<String> = raw_groups | ||
| .into_iter() | ||
| .map(|g| g.trim().to_lowercase()) | ||
| .map(|g| g.trim().to_string()) |
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Should we still trim the groups? Given we're not normalizing anymore. E.g. there could exist a role " wee wwoo "
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Problem:
JWT group names were lowercased before catalog lookup. When two roles differ only by case (e.g.
adminand"Admin"), the lowercase map built byroles_by_lowercase_namesilently picked the wrong role due to BTreeMap last-writer-wins semantics.Solution:
to_lowercase()from group extraction, replace the lowercase-map lookup insync_jwt_groupswith exacttry_get_role_by_name,roles_by_lowercase_nameandtry_get_role_by_name_case_insensitivemethodsTesting:
oidc_group_sync_case_sensitivewith an OIDC mock server to verify "Admin" cannot escalate to theadminroleRemove these sections if your commit already has a good description!
Fixes: SQL-276