| Package | Affected versions | Patched versions |
|---|---|---|
| org.apache.tomcat:tomcat | ≥ 4.1.0, < 4.1.40≥ 5.0.0, < 5.5.28≥ 6.0.0, < 6.0.19 | 4.1.405.5.286.0.19 |
| tomcat | = 4.1.0= 4.1.1= 4.1.10= 4.1.11= 4.1.12= 4.1.13= 4.1.14= 4.1.15= 4.1.16= 4.1.17= 4.1.18= 4.1.19= 4.1.2= 4.1.20= 4.1.21= 4.1.22= 4.1.23= 4.1.24= 4.1.25= 4.1.26= 4.1.27= 4.1.28= 4.1.29= 4.1.3= 4.1.30= 4.1.31= 4.1.32= 4.1.33= 4.1.34= 4.1.35= 4.1.36= 4.1.37= 4.1.38= 4.1.39= 4.1.4= 4.1.5= 4.1.6= 4.1.7= 4.1.8= 4.1.9= 5.5.0= 5.5.1= 5.5.10= 5.5.11= 5.5.12= 5.5.13= 5.5.14= 5.5.15= 5.5.16= 5.5.17= 5.5.18= 5.5.19= 5.5.2= 5.5.20= 5.5.21= 5.5.22= 5.5.23= 5.5.24= 5.5.25= 5.5.26= 5.5.27= 5.5.3= 5.5.4= 5.5.5= 5.5.6= 5.5.7= 5.5.8= 5.5.9= 6.0.0= 6.0.1= 6.0.10= 6.0.11= 6.0.12= 6.0.13= 6.0.14= 6.0.15= 6.0.16= 6.0.2= 6.0.3= 6.0.4= 6.0.5= 6.0.6= 6.0.7= 6.0.8= 6.0.9 |
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.
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