CVE-2018-20685

CVSS V2 Low 2.6 CVSS V3 Medium 5.3

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.

Overview

CVE ID
CVE-2018-20685

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2019-01-10T21:29:00

Last Modified Date
2023-02-23T23:15:18

Weakness Enumerations

CWE	URL
CWE-863	http://cwe.mitre.org/data/definitions/863.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version End
cpe:2.3:a:openbsd:openssh::::::::	1	OR	7.9
cpe:2.3:a:winscp:winscp::::::::	1	OR	5.13
cpe:2.3:a:netapp:cloud_backup:-:::::::*	1	OR
cpe:2.3:a:netapp:element_software:-:::::::*	1	OR
cpe:2.3:a:netapp:ontap_select_deploy:-:::::::*	1	OR
cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:::::::*	1	OR
cpe:2.3:a:netapp:storage_automation_store:-:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:8.0:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:9.0:::::::*	1	OR
cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*	1	OR
cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*	1	OR
cpe:2.3:o:oracle:solaris:10:::::::*	1	OR

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
HIGH

Authentication
NONE

Confidentiality Impact
NONE

Integrity Impact
PARTIAL

Availability Impact
NONE

Base Score
2.6

Severity
LOW

Exploitability Score
4.9

Impact Score
2.9

CVSS Version 3

Version
3.0

Vector String
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Attack Vector
NETWORK

Attack Compatibility
HIGH

Privileges Required
NONE

User Interaction
REQUIRED

Scope
UNCHANGED

Confidentiality Impact
NONE

Availability Impact
NONE

Base Score
5.3

Base Severity
MEDIUM

Exploitability Score
1.6

Impact Score
3.6

References

Reference URL	Reference Tags
http://www.securityfocus.com/bid/106531	Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2019:3702
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
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
https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/201903-16	Third Party Advisory
https://security.gentoo.org/glsa/202007-53
https://security.netapp.com/advisory/ntap-20190215-0001/	Third Party Advisory
https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt	Patch Third Party Advisory
https://usn.ubuntu.com/3885-1/	Third Party Advisory
https://www.debian.org/security/2019/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

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2018-20685
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20685

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 16:30:55				Added to TrackCVE
2022-12-03 16:18:20	2019-01-10T21:29Z	2019-01-10T21:29:00	CVE Published Date	updated
2022-12-03 16:18:20		2020-08-24T17:37:01	CVE Modified Date	updated
2022-12-03 16:18:20		Modified	Vulnerability Status	updated
2022-12-13 13:12:19		2022-12-13T12:15:25	CVE Modified Date	updated
2022-12-13 13:12:21			References	updated
2022-12-23 18:09:01	Modified	Undergoing Analysis	Vulnerability Status	updated
2023-02-24 01:08:05		2023-02-23T23:15:18	CVE Modified Date	updated
2023-02-24 01:08:05	Undergoing Analysis	Analyzed	Vulnerability Status	updated