CVE-2018-20685

moderate-risk
Published 2019-01-10

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.

Do I need to act?

~
3.4% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / HIGH complexity

Affected Products (20)

Affected Vendors

Debian Redhat Oracle Openbsd Siemens Fujitsu Winscp Canonical Netapp

References (28)

Broken Link http://www.securityfocus.com/bid/106531
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3702
Patch https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
Patch https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&r2...
Patch https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf...
Mailing List https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
Third Party Advisory https://security.gentoo.org/glsa/201903-16
Third Party Advisory https://security.gentoo.org/glsa/202007-53
Third Party Advisory https://security.netapp.com/advisory/ntap-20190215-0001/
Patch https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
Third Party Advisory https://usn.ubuntu.com/3885-1/
Third Party Advisory https://www.debian.org/security/2019/dsa-4387
Patch https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
Patch https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
Broken Link http://www.securityfocus.com/bid/106531
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3702
Patch https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
Patch https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197&r2...
Patch https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf...
Mailing List https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
and 8 more references
47
/ 100
moderate-risk
Severity 17/34 · Moderate
Exploitability 7/34 · Low
Exposure 23/34 · High