CVE-2020-20277 EXPLOIT
9.8
CRITICAL · CVSS 3.1 · EPSS 26.2% (pctl 98)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 26.24% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-22 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2020-12-18 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| troglobit | uftpd |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | uftpd 2.10 - Directory Traversal (Authenticated) | 2022-08-02 |
References
- http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html
- https://arinerron.com/blog/posts/6
- https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe
- http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html
- https://arinerron.com/blog/posts/6
- https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe
→ the Explorer · watch your stack · NVD