Is CVE-2020-5204 in the CISA KEV catalog?

No. CVE-2020-5204 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-5204?

CVE-2020-5204 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2020-5204?

CVE-2020-5204 has an EPSS score of 1.08% (61th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-5204?

Upgrade uftpd to 2.11 or later.

CVE & CISA-KEV Catalog

CVE-2020-5204

MEDIUM

6.5

CVSS v3

NVD

Description

In uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is caused by a buffer that is 16 bytes large being filled via sprintf() with user input based on the format specifier string %d.%d.%d.%d. The 16 byte size is correct for valid IPv4 addresses (len('255.255.255.255') == 16), but the format specifier %d allows more than 3 digits. This has been fixed in version 2.11

CWE-121Stack-based Buffer Overflow CWE-120Classic Buffer Overflow

How to fix

Remediation Available

uftpdNVD

Affected:< 2.11Fixed in:2.11CVE-2020-5204derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

Exploit Intelligence

1.08%probability of exploitation in 30 days

61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory1

github.com

Other references1

lists.opensuse.org

Related Vulnerabilities

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2009-0927	High	8.8	97%	KEV	Fix
CVE-2020-10924	High	8.8	87%	-	-
CVE-2022-20705	Critical	10.0	80%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.