Vulnerability Monitor

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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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network but requires specific conditions to be met though user interaction is required and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 30 products from openbsd, from winscp, from netapp and 27 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-01-10T21:29:00.377

Last Modified

2025-12-17T22:15:55.163

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:H/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: HIGH
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

4.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-863
Type: Secondary
CWE-863

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openbsd	openssh	≤ 7.9	Yes
Application	winscp	winscp	≤ 5.13	Yes
Application	netapp	cloud_backup	-	Yes
Application	netapp	element_software	-	Yes
Application	netapp	ontap_select_deploy	-	Yes
Application	netapp	steelstore_cloud_integrated_storage	-	Yes
Application	netapp	storage_automation_store	-	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	18.10	Yes
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	redhat	enterprise_linux_eus	8.1	Yes
Operating System	redhat	enterprise_linux_eus	8.2	Yes
Operating System	redhat	enterprise_linux_eus	8.4	Yes
Operating System	redhat	enterprise_linux_eus	8.6	Yes
Operating System	redhat	enterprise_linux_server_aus	8.2	Yes
Operating System	redhat	enterprise_linux_server_aus	8.4	Yes
Operating System	redhat	enterprise_linux_server_aus	8.6	Yes
Operating System	redhat	enterprise_linux_server_tus	8.2	Yes
Operating System	redhat	enterprise_linux_server_tus	8.4	Yes
Operating System	redhat	enterprise_linux_server_tus	8.6	Yes
Operating System	oracle	solaris	10	Yes
Operating System	fujitsu	m10-1_firmware	< xcp2361	Yes
Hardware	fujitsu	m10-1	-	No
Operating System	fujitsu	m10-4_firmware	< xcp2361	Yes
Hardware	fujitsu	m10-4	-	No
Operating System	fujitsu	m10-4s_firmware	< xcp2361	Yes
Hardware	fujitsu	m10-4s	-	No
Operating System	fujitsu	m12-1_firmware	< xcp2361	Yes
Hardware	fujitsu	m12-1	-	No
Operating System	fujitsu	m12-2_firmware	< xcp2361	Yes
Hardware	fujitsu	m12-2	-	No
Operating System	fujitsu	m12-2s_firmware	< xcp2361	Yes
Hardware	fujitsu	m12-2s	-	No
Operating System	fujitsu	m10-1_firmware	< xcp3070	Yes
Hardware	fujitsu	m10-1	-	No
Operating System	fujitsu	m10-4_firmware	< xcp3070	Yes
Hardware	fujitsu	m10-4	-	No
Operating System	fujitsu	m10-4s_firmware	< xcp3070	Yes
Hardware	fujitsu	m10-4s	-	No
Operating System	fujitsu	m10-4s_firmware	< xcp3070	Yes
Hardware	fujitsu	m10-4s	-	No
Operating System	fujitsu	m12-1_firmware	< xcp3070	Yes
Hardware	fujitsu	m12-1	-	No
Operating System	fujitsu	m12-2_firmware	< xcp3070	Yes
Hardware	fujitsu	m12-2	-	No
Operating System	fujitsu	m12-2s_firmware	< xcp3070	Yes
Hardware	fujitsu	m12-2s	-	No
Operating System	siemens	scalance_x204rna_firmware	< 3.2.7	Yes
Hardware	siemens	scalance_x204rna	-	No
Operating System	siemens	scalance_x204rna_eec_firmware	< 3.2.7	Yes
Hardware	siemens	scalance_x204rna_eec	-	No

References

http://www.securityfocus.com/bid/106531 Broken Link ([email protected])
https://access.redhat.com/errata/RHSA-2019:3702 Third Party Advisory ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf Patch, Third Party Advisory ([email protected])
https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&r2=1.198&f=h Patch ([email protected])
https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2 Patch ([email protected])
https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html Mailing List, Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/201903-16 Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202007-53 Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20190215-0001/ Third Party Advisory ([email protected])
https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt Patch, Third Party Advisory ([email protected])
https://usn.ubuntu.com/3885-1/ Third Party Advisory ([email protected])
https://www.debian.org/security/2019/dsa-4387 Third Party Advisory ([email protected])
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html Patch, Third Party Advisory ([email protected])
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html Patch, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/106531 Broken Link (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2019:3702 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&r2=1.198&f=h Patch (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201903-16 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202007-53 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20190215-0001/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3885-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2019/dsa-4387 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For openbsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.