Auth bypass in Fujitsu M10-1

CVE-2018-20685

In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side.

Vulnerability class: Broken Access Control

EPSS: 0.037 (88.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2018-20685?
CVE-2018-20685 is a medium-severity vulnerability in Fujitsu M10-1, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2019-01-10.
How severe is CVE-2018-20685?
Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2018-20685 known to be exploited?
21 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.