CVE-2017-20228
Flat Assembler 1.71.21 Stack-Based Buffer Overflow ROP
HIGH 8.6EPSS 0.2%
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.
- Affected
- Flatassembler · Flat Assembler
- CVSS v4.0 VULNCHECK
- 8.6 HIGH
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v3.1 NVD
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS v3.1 VULNCHECK
- 8.4 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.22% chance of exploitation in the next 30 days, 12th percentile
- Published
- 2026-03-28
- Updated
- 2026-10-01
Proof-of-concept exploits (1)
Security advisories
- https://www.vulncheck.com/advisories/flat-assembler-stack-based-buffer-overflow-rop
- http://www.flatassembler.net