Path Traversal in Troglobit Uftpd
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.262 (97.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.252 · newest: 0.262 · change: +0.010
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe (Patch, Third Party Advisory)
- arinerron.com/blog/posts/6 (Third Party Advisory)
- packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-20277?
- CVE-2020-20277 is a critical-severity vulnerability in Troglobit Uftpd, classified under Path Traversal. CVSS score: 9.8/10. Published 2020-12-18.
- How severe is CVE-2020-20277?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-20277 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.