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.
Published 2009-06-05 16:00:00
Updated 2023-02-13 02:19:39
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Information leak

Threat overview for CVE-2009-0580

Top countries where our scanners detected CVE-2009-0580
Top open port discovered on systems with this issue 80
IPs affected by CVE-2009-0580 11,520
Threat actors abusing to this issue? Yes
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Exploit prediction scoring system (EPSS) score for CVE-2009-0580

Probability of exploitation activity in the next 30 days: 97.24%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 100 % EPSS Score History EPSS FAQ

Metasploit modules for CVE-2009-0580

  • Apache Tomcat User Enumeration
    First seen: 2020-04-26
    This module enumerates Apache Tomcat's usernames via malformed requests to j_security_check, which can be found in the web administration package. It should work against Tomcat servers 4.1.0 - 4.1.39, 5.5.0 - 5.5.27, and 6.0.0 - 6.0.18. Newer versions no longer hav

CVSS scores for CVE-2009-0580

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source

CWE ids for CVE-2009-0580

References for CVE-2009-0580

Products affected by CVE-2009-0580

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