The _write_config function in trove/guestagent/datastore/experimental/mongodb/service.py, reset_configuration function in trove/guestagent/datastore/experimental/postgresql/service/config.py, write_config function in trove/guestagent/datastore/experimental/redis/service.py, _write_mycnf function in trove/guestagent/datastore/mysql/service.py, InnoBackupEx::_run_prepare function in trove/guestagent/strategies/restore/mysql_impl.py, InnoBackupEx::cmd function in trove/guestagent/strategies/backup/mysql_impl.py, MySQLDump::cmd in trove/guestagent/strategies/backup/mysql_impl.py, InnoBackupExIncremental::cmd function in trove/guestagent/strategies/backup/mysql_impl.py, _get_actual_db_status function in trove/guestagent/datastore/experimental/cassandra/system.py and trove/guestagent/datastore/experimental/cassandra/service.py, and multiple class CbBackup methods in trove/guestagent/strategies/backup/experimental/couchbase_impl.py in Openstack DBaaS (aka Trove) as packaged in Openstack before 2015.1.0 (aka Kilo) allows local users to write to configuration files via a symlink attack on a temporary file.
Weakness
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Trove | Openstack | * | 2014.2.4 (including) |
| Openstack-trove | Ubuntu | artful | * |
| Openstack-trove | Ubuntu | bionic | * |
| Openstack-trove | Ubuntu | cosmic | * |
| Openstack-trove | Ubuntu | disco | * |
| Openstack-trove | Ubuntu | eoan | * |
| Openstack-trove | Ubuntu | esm-apps/bionic | * |
| Openstack-trove | Ubuntu | esm-apps/focal | * |
| Openstack-trove | Ubuntu | esm-apps/jammy | * |
| Openstack-trove | Ubuntu | esm-apps/xenial | * |
| Openstack-trove | Ubuntu | focal | * |
| Openstack-trove | Ubuntu | groovy | * |
| Openstack-trove | Ubuntu | hirsute | * |
| Openstack-trove | Ubuntu | impish | * |
| Openstack-trove | Ubuntu | jammy | * |
| Openstack-trove | Ubuntu | kinetic | * |
| Openstack-trove | Ubuntu | lunar | * |
| Openstack-trove | Ubuntu | mantic | * |
| Openstack-trove | Ubuntu | trusty | * |
| Openstack-trove | Ubuntu | utopic | * |
| Openstack-trove | Ubuntu | vivid | * |
| Openstack-trove | Ubuntu | wily | * |
| Openstack-trove | Ubuntu | xenial | * |
| Openstack-trove | Ubuntu | yakkety | * |
| Openstack-trove | Ubuntu | zesty | * |
Potential Mitigations
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/132.html
- https://cwe.mitre.org/data/definitions/17.html
- https://cwe.mitre.org/data/definitions/35.html
- https://cwe.mitre.org/data/definitions/76.html
References
- https://bugs.launchpad.net/trove/+bug/1398195
- https://bugzilla.redhat.com/show_bug.cgi?id=1216073
- https://github.com/openstack/trove/blob/master/trove/guestagent/datastore/experimental/cassandra/service.py#L230
- https://github.com/openstack/trove/blob/master/trove/guestagent/datastore/experimental/mongodb/service.py#L176
- https://github.com/openstack/trove/blob/master/trove/guestagent/datastore/experimental/redis/service.py#L236
- https://github.com/openstack/trove/blob/master/trove/guestagent/datastore/mysql/service.py#L790
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/backup/experimental/couchbase_impl.py#L30
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/backup/mysql_impl.py#L110
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/backup/mysql_impl.py#L36
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/backup/mysql_impl.py#L55
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/restore/mysql_impl.py#L194
- https://bugs.launchpad.net/trove/+bug/1398195
- https://bugzilla.redhat.com/show_bug.cgi?id=1216073
- https://github.com/openstack/trove/blob/master/trove/guestagent/datastore/experimental/cassandra/service.py#L230
- https://github.com/openstack/trove/blob/master/trove/guestagent/datastore/experimental/mongodb/service.py#L176
- https://github.com/openstack/trove/blob/master/trove/guestagent/datastore/experimental/redis/service.py#L236
- https://github.com/openstack/trove/blob/master/trove/guestagent/datastore/mysql/service.py#L790
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/backup/experimental/couchbase_impl.py#L30
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/backup/mysql_impl.py#L110
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/backup/mysql_impl.py#L36
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/backup/mysql_impl.py#L55
- https://github.com/openstack/trove/blob/master/trove/guestagent/strategies/restore/mysql_impl.py#L194