Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, and 6.0.0 through 6.0.18, when FORM authentication is used, allows remote attackers to enumerate valid usernames via requests to /j_security_check with malformed URL encoding of passwords, related to improper error checking in the (1) MemoryRealm, (2) DataSourceRealm, and (3) JDBCRealm authentication realms, as demonstrated by a % (percent) value for the j_password parameter.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| org.apache.tomcat:tomcat(Maven) | 4.1.0 | 4.1.40 | N/A |
| org.apache.tomcat:tomcat(Maven) | 5.0.0 | 5.5.28 | N/A |
| org.apache.tomcat:tomcat(Maven) | 6.0.0 | 6.0.19 | N/A |
CVSS Metrics
