CVE-2017-20228 - CVE House
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Status published High CVE-2017-20228

Flat Assembler 1.71.21 Stack-Based Buffer Overflow ROP

Vulnerability Description

Flat Assembler 1.71.21 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying oversized input to the application. Attackers can craft malicious assembly input exceeding 5895 bytes to overwrite the instruction pointer and execute return-oriented programming chains for shell command execution.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

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

Affected Vendor

Flatassembler

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Affected Software

Flat Assembler
Vulnerable Versions:
1.71.21

Timeline

Official Publish: March 28th, 2026
Last Modified: March 30th, 2026
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)