Medium severity · published Jan 10, 2019
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
5.3
CVSS
3.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.7% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CB
Cloud Backup · Netapp
All versions, or not specified · source: NVD
DL
Debian Linux · Debian
8.0; 9.0 · source: NVD
ES
Element Software · Netapp
All versions, or not specified · source: NVD
EL
Enterprise Linux · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux Eus · Redhat
8.1; 8.2; 8.4; 8.6 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
8.2; 8.4; 8.6 · source: NVD
EL
Enterprise Linux Server Tus · Redhat
8.2; 8.4; 8.6 · source: NVD
MF
M10-1 Firmware · Fujitsu
before xcp2361; before xcp3070 · source: NVD
MF
M10-4 Firmware · Fujitsu
before xcp2361; before xcp3070 · source: NVD
MF
M10-4s Firmware · Fujitsu
before xcp2361; before xcp3070; before xcp3070 · source: NVD
MF
M12-1 Firmware · Fujitsu
before xcp2361; before xcp3070 · source: NVD
MF
M12-2 Firmware · Fujitsu
before xcp2361; before xcp3070 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20685
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-20685
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=1.198&f=h
Patch
https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2
Mailing List
https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
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