Home/CVE/In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filenam
CVE

CVE-2018-20685

In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filenam

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.

MEDIUM · CVSS 5.3 EPSS 0.03377
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules2 YARA rules0
⬡

Weakness Classification

CWE-863Incorrect Authorization
CWE-863Incorrect Authorization
▤

Affected Products & Versions

28
openbsd openssh<= 7.9
winscp<= 5.13
netapp cloud backupall versions
netapp element softwareall versions
netapp ontap select deployall versions
netapp steelstore cloud integrated storageall versions
netapp storage automation storeall versions
debian linuxall versions
◈

Sigma Hunt Rules

2
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumSuspicious OpenSSH Daemon Error
productmediumOpenSSH Server Listening On Socket
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Jan 2019 · 09:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

12
suse-csafopenSUSE-SU-2024:11124-1
siemens-csafSSA-412672
suse-csafSUSE-SU-2021:0527-1
suse-csafSUSE-SU-2019:0125-2
suse-csafopenSUSE-SU-2019:0091-1
🔗

References & Sources

13
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/106531Broken Link
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfPatchThird Party Advisory
https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&r2=1.198&f=hPatch
https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2Patch
https://lists.debian.org/debian-lts-announce/2019/03/msg00030.htmlMailing ListThird Party Advisory
https://security.gentoo.org/glsa/201903-16Third Party Advisory
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