CVE-2017-20228 Flat Assembler 1.71.21 Stack-Based Buffer Overflow ROP
Local attackers can execute arbitrary code via a stack-based buffer overflow in Flat Assembler by providing oversized assembly input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-20228?
CVE-2017-20228 is a high-severity memory corruption vulnerability in Flatassembler Flat Assembler, published on 28 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2017-20228?
It affects 1 product.
Products include Flatassembler Flat Assembler.
How do I fix CVE-2017-20228?
No fix has been published for CVE-2017-20228 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2017-20228 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20228 exists.
Sources
Also known as GHSA-g23f-7c8h-6698.