Detections
Analytics
CVE-2019-6111
medium
Description
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).
References
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://www.freebsd.org/security/advisories/FreeBSD-EN-19:10.scp.asc
https://www.debian.org/security/2019/dsa-4387
https://usn.ubuntu.com/3885-2/
https://usn.ubuntu.com/3885-1/
https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
https://security.netapp.com/advisory/ntap-20190213-0001/
https://security.gentoo.org/glsa/201903-16
https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://access.redhat.com/errata/RHSA-2019:3702