medium5.9Public exploit code
CVE-2019-6111
An issue was discovered in OpenSSH 7.9.
Public exploit code
Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.
- OpenSSH SCP Client - Write Arbitrary Files2019-01-11 · remote · multiple
- SCP Client - Multiple Vulnerabilities (SSHtranger Things)2019-01-18 · remote · multiple
Impact
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).
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openbsd | Openssh | through 7.9 |
| Winscp | Winscp | through 5.1.3 |
| Canonical | Ubuntu Linux | Versions 14.04, 16.04, 18.04, 18.10 |
| Debian | Debian Linux | Versions 8.0, 9.0 |
| Redhat | Enterprise Linux | Versions 7.0, 8.0 |
| Redhat | Enterprise Linux Eus | Versions 8.1, 8.2, 8.4, 8.6 |
| Redhat | Enterprise Linux Server Aus | Versions 8.2, 8.4, 8.6 |
| Redhat | Enterprise Linux Server Tus | Versions 8.2, 8.4, 8.6 |
| Fedoraproject | Fedora | Version 30 |
| Apache | Mina Sshd | Version 2.2.0 |
| Freebsd | Freebsd | before 12.0 Version 12.0 |
| Fujitsu | M10-1 Firmware | before xcp2361 before xcp3070 |
Weakness classification
References
- NVD record
- CVE.org record
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.html
- 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://bugzilla.redhat.com/show_bug.cgi?id=1677794
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c
- https://lists.apache.org/thread.html/c45d9bc90700354b58fb7455962873c44229841880dcb64842fa7d23%40%3Cdev.mina.apache.org%3E
- https://lists.apache.org/thread.html/c7301cab36a86825359e1b725fc40304d1df56dc6d107c1fe885148b%40%3Cdev.mina.apache.org%3E
- https://lists.apache.org/thread.html/d540139359de999b0f1c87d05b715be4d7d4bec771e1ae55153c5c7a%40%3Cdev.mina.apache.org%3E
- https://lists.apache.org/thread.html/e47597433b351d6e01a5d68d610b4ba195743def9730e49561e8cf3f%40%3Cdev.mina.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3YVQ2BPTOVDCFDVNC2GGF5P5ISFG37G/
- 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.exploit-db.com/exploits/46193/
- https://www.freebsd.org/security/advisories/FreeBSD-EN-19:10.scp.asc
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html