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CVE-2009-0580

UnknownEPSS 94.44%

Last modified

CVE-2009-0580 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 94.44% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
94.44%

99.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ApacheTomcat4.1.0
ApacheTomcat4.1.1
ApacheTomcat4.1.2
ApacheTomcat4.1.3
ApacheTomcat4.1.4
ApacheTomcat4.1.5
ApacheTomcat4.1.6
ApacheTomcat4.1.7
ApacheTomcat4.1.8
ApacheTomcat4.1.9
ApacheTomcat4.1.10
ApacheTomcat4.1.11
ApacheTomcat4.1.12
ApacheTomcat4.1.13
ApacheTomcat4.1.14
ApacheTomcat4.1.15
ApacheTomcat4.1.16
ApacheTomcat4.1.17
ApacheTomcat4.1.18
ApacheTomcat4.1.19
ApacheTomcat4.1.20
ApacheTomcat4.1.21
ApacheTomcat4.1.22
ApacheTomcat4.1.23
ApacheTomcat4.1.24
ApacheTomcat4.1.25
ApacheTomcat4.1.26
ApacheTomcat4.1.27
ApacheTomcat4.1.28
ApacheTomcat4.1.29
ApacheTomcat4.1.30
ApacheTomcat4.1.31
ApacheTomcat4.1.32
ApacheTomcat4.1.33
ApacheTomcat4.1.34
ApacheTomcat4.1.35
ApacheTomcat4.1.36
ApacheTomcat4.1.37
ApacheTomcat4.1.38
ApacheTomcat4.1.39
ApacheTomcat5.5.0
ApacheTomcat5.5.1
ApacheTomcat5.5.2
ApacheTomcat5.5.3
ApacheTomcat5.5.4
ApacheTomcat5.5.5
ApacheTomcat5.5.6
ApacheTomcat5.5.7
ApacheTomcat5.5.8
ApacheTomcat5.5.9

Showing 50 of 85 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2009-0580?
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.
How severe is CVE-2009-0580?
Severity scoring for CVE-2009-0580 is pending analysis. The EPSS model estimates a 94.44% probability of exploitation in the next 30 days.
How do I fix CVE-2009-0580?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST