VULNERABILITY INTELLIGENCE

CVE-2020-5204

CVSS score6.5 MEDIUM
EPSS probability1.08%
CISA KEVNot currently listed
Published2020-01-06
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

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

Weakness classification

  • security-advisories@github.com: CWE-121
  • nvd@nist.gov: CWE-120

Primary references