CVE-2020-20277

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.

CVSS v3.1 NVD

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

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

26.24% chance of exploitation in the next 30 days, 98th percentile

Published

2020-12-18

Updated

2024-08-04

Proof-of-concept exploits (1)

• http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/51000

Security advisories

• https://arinerron.com/blog/posts/6
• troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe

References

• CVE Record
• NVD entry