CVE-2018-20685
Published: August 31, 2023Last modified: August 31, 2023
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | REQUIRED |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | HIGH |
| Availability impact | NONE |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | openssh | Not affected (9.1_p1-r5) |
| Stream | openssh | Not affected (9.4_p1-r0) |
References
- http://www.securityfocus.com/bid/106531
- 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
- https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2
- https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
- https://security.gentoo.org/glsa/201903-16
- https://security.gentoo.org/glsa/202007-53
- https://security.netapp.com/advisory/ntap-20190215-0001/
- https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
- https://usn.ubuntu.com/3885-1/
- https://www.debian.org/security/2019/dsa-4387
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html