Stack-based Buffer Overflow in JAD Java Decompiler by Varaneckas
CVE-2017-20227

9.3CRITICAL

Key Information:

Vendor

Varaneckas

Status
Jad Java Decompiler
Vendor
CVE Published:
28 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2017-20227?

JAD Java Decompiler versions up to 1.5.8e-1kali1 are susceptible to a stack-based buffer overflow vulnerability. This allows attackers to execute arbitrary code by providing maliciously crafted input that exceeds the buffer length. By exploiting this weakness, attackers can manipulate the program's execution flow, potentially leading to unauthorized system access or control. Attackers primarily target the jad command to exploit this vulnerability, which could result in a full system compromise if deployed in vulnerable environments.

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Affected Version(s)

JAD Java Decompiler 1.5.8e

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2017-20227 - Proof of Concept

References

https://www.exploit-db.com/exploits/42255
exploit
http://www.varaneckas.com/jad/
product
https://www.vulncheck.com/advisories/jad-8e-1kali1-stack-...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Juan Sacco <juan.sacco@kpn.com> at KPN Red Team - http://www.kpn.com
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