medium
5.3
CWE
863
Advisory Published
Updated

CVE-2018-20685

First published: Thu Jan 10 2019(Updated: )

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. Upstream Patch: <a href="https://github.com/openssh/openssh-portable/commit/6010c030">https://github.com/openssh/openssh-portable/commit/6010c030</a> <a href="https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&amp;r2=1.198&amp;f=h">https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&amp;r2=1.198&amp;f=h</a>

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/openssh<=1:7.4p1-10<=1:7.9p1-4<=1:7.4p1-10+deb9u4
1:7.9p1-5
1:7.4p1-10+deb9u5
debian/openssh
1:8.4p1-5+deb11u3
1:8.4p1-5+deb11u4
1:9.2p1-2+deb12u5
1:9.9p2-2
OpenSSH<=7.9
WinSCP<=5.13
NetApp Cloud Backup
NetApp Management Services for Element Software
NetApp ONTAP Select Deploy Utility
NetApp SteelStore Cloud Integrated Storage
NetApp Storage Automation Store
Debian Linux=8.0
Debian Linux=9.0
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=18.10
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux Server EUS=8.1
Red Hat Enterprise Linux Server EUS=8.2
Red Hat Enterprise Linux Server EUS=8.4
Red Hat Enterprise Linux Server EUS=8.6
Red Hat Enterprise Linux Server=8.2
Red Hat Enterprise Linux Server=8.4
Red Hat Enterprise Linux Server=8.6
Red Hat Enterprise Linux Server=8.2
Red Hat Enterprise Linux Server=8.4
Red Hat Enterprise Linux Server=8.6
Oracle Solaris and Zettabyte File System (ZFS)=10
All of
Oracle Fujitsu M10-1 Firmware<xcp2361
Oracle Fujitsu M10-1
All of
Oracle Fujitsu M10-4 Firmware<xcp2361
Oracle Fujitsu M10-4
All of
Oracle Fujitsu M10-4S Firmware<xcp2361
Fujitsu M10-4S
All of
Oracle Fujitsu M12-1 Firmware<xcp2361
Oracle Fujitsu M12-1 Firmware
All of
Oracle Fujitsu M12-2 Firmware<xcp2361
Fujitsu SPARC M12-2
All of
Fujitsu SPARC M12-2S<xcp2361
Fujitsu SPARC M12-2S
All of
Oracle Fujitsu M10-1 Firmware<xcp3070
Oracle Fujitsu M10-1
All of
Oracle Fujitsu M10-4 Firmware<xcp3070
Oracle Fujitsu M10-4
All of
Oracle Fujitsu M10-4S Firmware<xcp3070
Fujitsu M10-4S
All of
Oracle Fujitsu M12-1 Firmware<xcp3070
Oracle Fujitsu M12-1 Firmware
All of
Oracle Fujitsu M12-2 Firmware<xcp3070
Fujitsu SPARC M12-2
All of
Fujitsu SPARC M12-2S<xcp3070
Fujitsu SPARC M12-2S
All of
Siemens Scalance X204RNA EEC Firmware<3.2.7
Siemens Scalance X204RNA EEC
All of
Siemens Scalance X204RNA ECC Firmware<3.2.7
Siemens Scalance X204RNA EEC Firmware
Oracle Fujitsu M10-1 Firmware<xcp2361
Oracle Fujitsu M10-1
Oracle Fujitsu M10-4 Firmware<xcp2361
Oracle Fujitsu M10-4
Oracle Fujitsu M10-4S Firmware<xcp2361
Fujitsu M10-4S
Oracle Fujitsu M12-1 Firmware<xcp2361
Oracle Fujitsu M12-1 Firmware
Oracle Fujitsu M12-2 Firmware<xcp2361
Fujitsu SPARC M12-2
Fujitsu SPARC M12-2S<xcp2361
Fujitsu SPARC M12-2S
Oracle Fujitsu M10-1 Firmware<xcp3070
Oracle Fujitsu M10-4 Firmware<xcp3070
Oracle Fujitsu M10-4S Firmware<xcp3070
Oracle Fujitsu M12-1 Firmware<xcp3070
Oracle Fujitsu M12-2 Firmware<xcp3070
Fujitsu SPARC M12-2S<xcp3070
Siemens Scalance X204RNA EEC Firmware<3.2.7
Siemens Scalance X204RNA EEC
Siemens Scalance X204RNA ECC Firmware<3.2.7
Siemens Scalance X204RNA EEC Firmware

Remedy

https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2

Remedy

https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&r2=1.198&f=h

Remedy

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

Remedy

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

Remedy

https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

Remedy

https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2018-20685?

    CVE-2018-20685 is considered a medium severity vulnerability, allowing bypass of access restrictions in the OpenSSH scp client.

  • How do I fix CVE-2018-20685?

    To fix CVE-2018-20685, update OpenSSH to version 7.9p1-5 or later.

  • Which software is affected by CVE-2018-20685?

    CVE-2018-20685 affects OpenSSH version 7.9 and earlier, including variants in Debian and other distributions.

  • What is the impact of CVE-2018-20685?

    The impact of CVE-2018-20685 is the potential for unauthorized file access due to improper filename handling.

  • Is CVE-2018-20685 relevant for my system?

    CVE-2018-20685 is relevant if you are using an affected version of OpenSSH in your system or application.

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