CVE-2020-20277

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

There are multiple unauthenticated directory traversal vulnerabilities in different FTP commands in uftpd FTP server versions 2.7 to 2.10 due to improper implementation of a chroot jail in common.c's compose_abspath function that can be abused to read or write to arbitrary files on the filesystem, leak process memory, or potentially lead to remote code execution.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-22

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.htmlExploit, Third Party Advisory, VDB Entry
https://arinerron.com/blog/posts/6Third Party Advisory
https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fePatch, Third Party Advisory
http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.htmlExploit, Third Party Advisory, VDB Entry
https://arinerron.com/blog/posts/6Third Party Advisory
https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fePatch, Third Party Advisory

Timeline

Published: Dec 18, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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