CVE-2018-20685

MEDIUMMonitor

Published:Jan 10, 2019(7 years ago)

Modified:Dec 17, 2025

Remote ExploitNo Auth Required

Vulnerability Description

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.

Attack Characteristics

Network AccessHigh ComplexityNo Auth NeededUser Interaction Required

🤖

AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
openbsd	openssh	7.9	-
winscp	winscp	5.13	-
netapp	cloud_backup	-

Timeline

Published
CVE disclosed publicly
Jan 10, 20197 years ago
Last Modified
Most recent update
Dec 17, 20255 months ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

http://www.securityfocus.com/bid/106531Broken Link
https://access.redhat.com/errata/RHSA-2019:3702Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfPatch

CVSS Score

v3.1

5.3/ 10.0

MEDIUM

AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

At a Glance

Affected Products

References

openbsd / openssh

https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r...Patch

https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa...Patch

https://lists.debian.org/debian-lts-announce/2019/03/msg00030.htmlMailing List

https://security.gentoo.org/glsa/201903-16Third Party Advisory

https://security.gentoo.org/glsa/202007-53Third Party Advisory

https://security.netapp.com/advisory/ntap-20190215-0001/Third Party Advisory

https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txtPatch

https://usn.ubuntu.com/3885-1/Third Party Advisory

https://www.debian.org/security/2019/dsa-4387Third Party Advisory

https://www.oracle.com/technetwork/security-advisory/cpuapr2019-507281...Patch

https://www.oracle.com/technetwork/security-advisory/cpuoct2019-507283...Patch

http://www.securityfocus.com/bid/106531Broken Link

https://access.redhat.com/errata/RHSA-2019:3702Third Party Advisory

https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfPatch

https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r...Patch

https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa...Patch

https://lists.debian.org/debian-lts-announce/2019/03/msg00030.htmlMailing List

https://security.gentoo.org/glsa/201903-16Third Party Advisory

https://security.gentoo.org/glsa/202007-53Third Party Advisory

https://security.netapp.com/advisory/ntap-20190215-0001/Third Party Advisory

https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txtPatch

https://usn.ubuntu.com/3885-1/Third Party Advisory

https://www.debian.org/security/2019/dsa-4387Third Party Advisory

https://www.oracle.com/technetwork/security-advisory/cpuapr2019-507281...Patch

https://www.oracle.com/technetwork/security-advisory/cpuoct2019-507283...Patch

CVSS v3 Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

Impact

ScopeUnchanged

ConfidentialityNone

IntegrityHigh

AvailabilityNone

Impact Analysis

ConfidentialityNone

NoneLowHigh

IntegrityHigh

NoneLowHigh

AvailabilityNone

NoneLowHigh

CVE-2018-20685

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description