CVE-2019-6111
MEDIUM 5.9EPSS 58.2%
An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).
- CVSS v3.1 NVD
- 5.9 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS v2.0 NVD
- 5.8 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:P - EPSS
- 58.20% chance of exploitation in the next 30 days, 99th percentile
- Published
- 2019-01-31
- Updated
- 2026-10-14
Proof-of-concept exploits (2)
ExploitDB entries (2)
Security advisories
- http://www.openwall.com/lists/oss-security/2019/04/18/1
- http://www.openwall.com/lists/oss-security/2022/08/02/1
- http://www.securityfocus.com/bid/106741
- https://access.redhat.com/errata/RHSA-2019:3702
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
- https://security.gentoo.org/glsa/201903-16
- https://security.netapp.com/advisory/ntap-20190213-0001
- https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
- https://usn.ubuntu.com/3885-1
- https://usn.ubuntu.com/3885-2
- https://www.debian.org/security/2019/dsa-4387
- https://www.freebsd.org/security/advisories/FreeBSD-EN-19:10.scp.asc
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c