A cleverly devised username might bypass LDAP authentication checks. In LDAP-authenticated Derby installations, this could let an attacker fill up the disk by creating junk Derby databases. In LDAP-authenticated Derby installations, this could also allow the attacker to execute malware which was visible to and executable by the account which booted the Derby server. In LDAP-protected databases which weren't also protected by SQL GRANT/REVOKE authorization, this vulnerability could also let an attacker view and corrupt sensitive data and run sensitive database functions and procedures. Mitigation: Users should upgrade to Java 21 and Derby 10.17.1.0. Alternatively, users who wish to remain on older Java versions should build their own Derby distribution from one of the release families to which the fix was backported: 10.16, 10.15, and 10.14. Those are the releases which correspond, respectively, with Java LTS versions 17, 11, and 8.

XML external entity (XXE) vulnerability in the SqlXmlUtil code in Apache Derby before 10.12.1.1, when a Java Security Manager is not in place, allows context-dependent attackers to read arbitrary files or cause a denial of service (resource consumption) via vectors involving XmlVTI and the XML datatype.

The password hash generation algorithm in the BUILTIN authentication functionality for Apache Derby before 10.6.1.0 performs a transformation that reduces the size of the set of inputs to SHA-1, which produces a small search space that makes it easier for local and possibly remote attackers to crack passwords by generating hash collisions, related to password substitution.

Apache Derby before 10.2.1.6 does not determine privilege requirements for lock table statements at compilation time, and consequently does not enforce privilege requirements at execution time, which allows remote authenticated users to lock arbitrary tables.

Apache Derby before 10.2.1.6 does not determine schema privilege requirements during the DropSchemaNode bind phase, which allows remote authenticated users to execute arbitrary drop schema statements in SQL authorization mode.

Apache Derby before 10.1.2.1 exposes the (1) user and (2) password attributes in cleartext via (a) the RDBNAM parameter of the ACCSEC command and (b) the output of the DatabaseMetaData.getURL function, which allows context-dependent attackers to obtain sensitive information.