Local code execution via oversized command argument
Published Mar 28, 2026 · Updated Mar 28, 2026
Stack-based buffer overflow in JAD Java Decompiler 1.5.8e allows local users to execute arbitrary code via an oversized command argument. The jad executable accepts an approximately 8,150-byte command argument without adequate boundary checks, overwriting stack control data. A local user who can invoke jad can use a ROP chain to spawn a shell in the application's security context; failed attempts crash the process.
Summary
What happened
Stack-based buffer overflow in JAD Java Decompiler 1.5.8e allows local users to execute arbitrary code via an oversized command argument. The jad executable accepts an approximately 8,150-byte command argument without adequate boundary checks, overwriting stack control data. A local user who can invoke jad can use a ROP chain to spawn a shell in the application's security context; failed attempts crash the process.
The record
- CVE
- CVE-2017-20227
- Published
- Mar 28, 2026
- Updated
- Mar 28, 2026
- Vendor
- Pavel Kouznetsov
- Product
- JAD
- Classifications
- CWE-787, T1203
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 28, 2026CVE publishedPublication date reported by the CVE source.
- Mar 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=1.5.8e
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- JAD Java Decompiler 1.5.8e - Local Buffer Overflow (NX Enabled)weaponized · validated
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Technologies
Your stack
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Your stack
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