Path Traversal in Linux Kernel
CVE-2020-8227
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.258 (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: 0.258 · newest: 0.258 · change: 0.000
Affected products
- Linux Kernel
- Nextcloud Desktop
- Desktop Client — versions 2.6.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/590319 (Exploit, Third Party Advisory)
- nextcloud.com/security/advisory/ (Exploit, Broken Link, Vendor Advisory)
- security.gentoo.org/glsa/202009-09 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8227?
- CVE-2020-8227 is a medium-severity vulnerability in Linux Kernel, classified under Path Traversal. CVSS score: 6.8/10. Published 2020-08-21.
- How severe is CVE-2020-8227?
- Medium severity. CVSS v3 base score is 6.8 out of 10.
- Is CVE-2020-8227 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.