Cyber Resilience

CVE-2021-40239

CriticalPublic PoC

Published: 11 October 2021

Published
11 October 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0041 62.0th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-40239 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Miniftpd Project Miniftpd. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 38.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

A Buffer Overflow vulnerability exists in the latest version of Miniftpd in the do_retr function in ftpproto.c

CWE(s)
CWE-120

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

miniftpd project
miniftpd
1.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-120

Platform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.

References