Local code execution via overlong SETTINGS argument
Published Mar 28, 2026 · Updated Mar 28, 2026
Stack-based buffer overflow in CrashMail II 1.6 allows local users to execute arbitrary code through a crafted SETTINGS argument. Processing an overlong SETTINGS command-line value overruns a stack buffer; the published Linux payload reaches the saved instruction pointer after 216 bytes and pivots to a ROP chain. Exploitation requires local ability to invoke the CrashMail executable; success runs code in its process context, while failure crashes it.
Summary
What happened
Stack-based buffer overflow in CrashMail II 1.6 allows local users to execute arbitrary code through a crafted SETTINGS argument. Processing an overlong SETTINGS command-line value overruns a stack buffer; the published Linux payload reaches the saved instruction pointer after 216 bytes and pivots to a ROP chain. Exploitation requires local ability to invoke the CrashMail executable; success runs code in its process context, while failure crashes it.
The record
- CVE
- CVE-2018-25223
- Published
- Mar 28, 2026
- Updated
- Mar 28, 2026
- Vendor
- Crashmail
- Product
- CrashMail II
- Classifications
- CWE-787
- 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=1.6
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.
Weakness, pattern, technique
Public exploit references
- Crashmail 1.6 Stack-Based Buffer Overflow ROPfunctional · demonstrated
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Technologies
Your stack
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Your stack
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