CVE-2017-20227 | JAD Java Decompiler 1.5.8e-1kali1 and prior contains a stack… | CVSS 9.8 CRITICAL

Description

JAD Java Decompiler 1.5.8e-1kali1 and prior contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying overly long input that exceeds buffer boundaries. Attackers can craft malicious input passed to the jad command to overflow the stack and execute a return-oriented programming chain that spawns a shell.

Metadata

CVE ID: CVE-2017-20227
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-03-28 11:44 UTC
Published: 2026-03-28 11:58 UTC
Last updated: 2026-04-01 13:59 UTC
Primary CWE: CWE-787
Out-of-bounds Write
Vendor / Product: Varaneckas / JAD Java Decompiler
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Varaneckas	JAD Java Decompiler	—	1.5.8e

Weakness (CWE)

CWE	Source	Description
CWE-787	cna	Out-of-bounds Write

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (3)

ExploitDB-42255 https://www.exploit-db.com/exploits/42255
Official Product Homepage http://www.varaneckas.com/jad/
VulnCheck Advisory: JAD 1.5.8e-1kali1 Stack-Based Buffer Overflow https://www.vulncheck.com/advisories/jad-8e-1kali1-stack-based-buffer-overflow