CVE-2009-1096: n/a vulnerability

CVE-2009-1096: Buffer overflow in unpack200 in Java SE Development Kit (JDK) and Java Runtime Environment (JRE) 5.0 Update...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 04:57 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw affects very old Java runtimes and development kits. A malicious JAR file with crafted Pack200 metadata could trigger a buffer overflow in unpack200, potentially allowing file access or arbitrary code execution. Business urgency depends on whether any legacy Java 5 or early Java 6 remains in use. Exposure is most likely in legacy systems, appliances, or applications still carrying Java 5.0 Update 17 or earlier, or Java 6 Update 12 or earlier. Systems that process, open, or distribute untrusted JAR content deserve priority review. Treat this as a legacy technology risk with high impact if exposed. Prioritize finding and retiring obsolete Java installations, especially on systems that handle external files or user-supplied JAR content. Mitigation focus: Inventory all Java Runtime Environment and Java Development Kit installations.; Remove unsupported Java 5 and early Java 6 runtimes where possible.; Use vendor advisories to identify corrected packages for each platform..

Prepared: Jun 28, 2026, 11:04 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Execution behavior lookup

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CVE-2009-1096 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 25, 2009, 23:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:6659CVE reference · vdb-entry, signature
RHSA-2009:1198CVE reference · vendor-advisory, x_refsource_REDHAT
RHSA-2009:0377CVE reference · vendor-advisory, x_refsource_REDHAT
oval:org.mitre.oval:def:8844CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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