Java Runtime Environment (JRE) Bytecode Verifier allows remote attackers to escape the Java sandbox and execute commands via an applet conta
Java Runtime Environment (JRE) Bytecode Verifier allows remote attackers to escape the Java sandbox and execute commands via an applet containing an illegal cast operation, as seen in (1) Microsoft VM build 3802 and earlier as used in Internet Explorer 4.x and 5.x, (2) Netscape 6.2.1 and earlier, and possibly other implementations that use vulnerable versions of SDK or JDK, aka a variant of the "Virtual Machine Verifier" vulnerability.
- Published
- Mar 19, 2002
- Updated
- Jun 16, 2026
- EPSS
- 26.9% · 98th percentile
- CWE
- —
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Report tools
Action score
38
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 8 / 30 · 26.9%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| hp | java jre-jdk | cpe:2.3:a:hp:java_jre-jdk |
| microsoft | virtual machine | cpe:2.3:a:microsoft:virtual_machine |
| sun | jdk | cpe:2.3:a:sun:jdk |
| sun | jre | cpe:2.3:a:sun:jre |
| sun | sdk | cpe:2.3:a:sun:sdk |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- hp java jre-jdk1.1.8
- hp java jre-jdk1.2.2
- hp java jre-jdk1.3
- microsoft virtual machine3802
- sun jdk1.1.8
- sun jre1.1.8
- sun jre1.2.2
- sun jre1.3.0
- sun jre1.3.1
- sun sdk1.2.2_010
- sun sdk1.2.2_10
- sun sdk1.3_05
- sun sdk1.3.1_01
- sun sdk1.3.1_01a
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- P · data can be read
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- P
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
—
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/218
- www.iss.net/security_center/static/8480.php
- www.securityfocus.com/bid/4313
- docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-013
Vendor advisories and official records. Exploit/PoC links are deliberately left out.