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Fix potential error revoking privileges in postgres secret engine #28519

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merged 3 commits into from
Sep 26, 2024
Merged

Fix potential error revoking privileges in postgres secret engine #28519

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facfb85
Fix potential error revoking privileges in postgres secret engine
lboynton Sep 26, 2024
24cd5a4
add changelog entry
lboynton Sep 26, 2024
fe53c7e
fix changelog format
fairclothjm Sep 26, 2024
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3 changes: 3 additions & 0 deletions changelog/28519.txt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
```release-note:bug
database/postgresql: Fix potential error revoking privileges in postgresql database secrets engine when a schema contains special characters
```
2 changes: 1 addition & 1 deletion plugins/database/postgresql/postgresql.go
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Expand Up @@ -529,7 +529,7 @@ func (p *PostgreSQL) defaultDeleteUser(ctx context.Context, username string) err
}
revocationStmts = append(revocationStmts, fmt.Sprintf(
`REVOKE ALL PRIVILEGES ON ALL TABLES IN SCHEMA %s FROM %s;`,
(schema),
dbutil.QuoteIdentifier(schema),
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I am not so sure this is a straightforward change. Is this backwards compatible? It doesn't appear to be so based on http://www.postgresql.org/docs/9.2/static/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS

Quoting an identifier also makes it case-sensitive, whereas unquoted names are always folded to lower case.

So we might break users that depend on case-insensitivity.

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hmm, it looks like we already quote the schema name in the next revoke call here: https://github.com/hashicorp/vault/blame/2db2a9fb5d890b213a2c05aa5698c63560399774/plugins/database/postgresql/postgresql.go#L537

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Yeah it used to be quoted but it was (unintentionally I guess) dropped in this PR: #15343

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Thanks! Do you mind adding a changelog entry?

changelog/28519.txt

database/postgresql: Fix potential error revoking privileges in postgresql database secrets engine when a schema contains special characters

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Added

dbutil.QuoteIdentifier(username)))

revocationStmts = append(revocationStmts, fmt.Sprintf(
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