CVE-2017-20228
CVE-2017-20228 is a high-severity vulnerability in Flatassembler Flat Assembler with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 8.4)
- CVSS v4: 8.6
- EPSS exploit prediction: 0% (12th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2017-18949
- Weakness: CWE-787
- Affected product: Flatassembler Flat Assembler
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2017-20228?
- 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.
- How severe is CVE-2017-20228?
- CVE-2017-20228 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2017-20228 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2017-20228?
- CVE-2017-20228 affects Flatassembler Flat Assembler. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2017-20228?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2017-20228 have an EU (EUVD) identifier?
- Yes. CVE-2017-20228 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-18949.
- When was CVE-2017-20228 published?
- CVE-2017-20228 was published on 2026-03-28 and last updated on 2026-06-17.
References
- http://www.flatassembler.net
- https://www.exploit-db.com/exploits/42265
- https://www.vulncheck.com/advisories/flat-assembler-stack-based-buffer-overflow-rop
Affected products (1)
- cpe:2.3:a:flatassembler:flat_assembler:*:*:*:*:*:*:*:*
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