Auth bypass in Provideserver Provide FTP Server
CVE-2020-11707
An issue was discovered in ProVide (formerly zFTPServer) through 13.1. It doesn't enforce permission over Windows Symlinks or Junctions. As a result, a low-privileged user (non-admin) can craft a Junction Link in a directory he has full control of, breaking out of the sandbox.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.provideserver.com/security/ (Vendor Advisory)
- github.com/belong2yourself/vulnerabilities/tree/master/ProVide/Sandbox Escape v… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-11707?
- CVE-2020-11707 is a high-severity vulnerability in Provideserver Provide FTP Server, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2020-04-12.
- How severe is CVE-2020-11707?
- High severity. CVSS v3 base score is 8.8 out of 10.