CVE-2018-20685 - Use of Incorrectly-Resolved Name or Reference

Severity

26%

Complexity

49%

Confidentiality

48%

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.

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.

CVSS 3.0 Base Score 5.3. CVSS Attack Vector: network. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N).

CVSS 2.0 Base Score 2.6. CVSS Attack Vector: network. CVSS Attack Complexity: high. CVSS Vector: (AV:N/AC:H/Au:N/C:N/I:P/A:N).

Overview

First reported 6 years ago

2019-01-10 21:29:00

Last updated 5 years ago

2019-10-16 18:15:00

Affected Software

OpenBSD OpenSSH

NetApp Element Software

Debian Linux 8.0 (Jessie)

8.0

Debian Linux 9.0

9.0

Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)

14.04

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

Canonical Ubuntu Linux 18.04 LTS Edition

18.04

Canonical Ubuntu Linux 18.10

18.10

Red Hat Enterprise Linux (RHEL) 7.0 (7)

7.0

Oracle Solaris 10

10

References

106531

Third Party Advisory, VDB Entry

RHSA-2019:3702

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-20685

Issue Tracking, Patch, Third Party Advisory

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

Patch, Third Party Advisory

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

Patch, Third Party Advisory

[debian-lts-announce] 20190325 [SECURITY] [DLA 1728-1] openssh security update

Mailing List, Third Party Advisory

GLSA-201903-16

Third Party Advisory

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

Third Party Advisory

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

Patch, Third Party Advisory

USN-3885-1

Third Party Advisory

DSA-4387

Third Party Advisory

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

Patch

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

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