CVE-2020-5204

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-121
• CWE-120

• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00034.html
• https://github.com/troglobit/uftpd/commit/0fb2c031ce0ace07cc19cd2cb2143c4b5a63c9ddPatch, Third Party Advisory
• https://github.com/troglobit/uftpd/security/advisories/GHSA-wrpr-xw7q-9wvqThird Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00034.html
• https://github.com/troglobit/uftpd/commit/0fb2c031ce0ace07cc19cd2cb2143c4b5a63c9ddPatch, Third Party Advisory
• https://github.com/troglobit/uftpd/security/advisories/GHSA-wrpr-xw7q-9wvqThird Party Advisory

Published

Jan 6, 2020

Last Modified

Jun 17, 2026

Status

Modified

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