CRITICAL
CVE-2009-1095
CWE-189Published: March 25, 2009· Updated: Jun 16, 2026
10.0
CVSS v3.1
Official Description
Integer 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.
Technical Analysis
CVE-2009-1095 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:N/AC:L/Au:N/C:C/I:C/A:C
Affected Vendors & Products
sun2 product(s)
jdkjre
Source: NVD CPE · 6 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (88)
→
http://secunia.com/advisories/34489Vendor Advisory
→
http://secunia.com/advisories/34495Vendor Advisory
→
http://secunia.com/advisories/34496Vendor Advisory
→
http://secunia.com/advisories/34632Vendor Advisory
→
http://secunia.com/advisories/34675Vendor Advisory
→
http://secunia.com/advisories/35156Vendor Advisory
→
http://secunia.com/advisories/35223Vendor Advisory
→
http://secunia.com/advisories/35255Vendor Advisory
Quick Facts
CVE IDCVE-2009-1095
CVSS Score10.0 / 10
SeverityCRITICAL
WeaknessCWE-189
CISA KEVNo
Affected1 vendor(s)
PublishedMar 25, 2009
Related CVEs (CWE-189)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2009-1095 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.