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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.037 (89.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.debian.org/security/2019/dsa-4387 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3885-1/ (vendor-advisory, Third Party Advisory)
- github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7… (Patch)
- cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff (Patch)
- security.netapp.com/advisory/ntap-20190215-0001/ (Third Party Advisory)
- www.securityfocus.com/bid/106531 (vdb-entry, Broken Link)
- sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt (Patch, Third Party Advisory)
- security.gentoo.org/glsa/201903-16 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/03/msg00030.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (Patch, Third Party Advisory)
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.