CVE-2019-6111: Path Traversal
First published: Tue Jan 15 2019(Updated: )
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).
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Openbsd Openssh | <=7.9 | |
| Winscp Winscp | <=5.1.3 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =18.10 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux Eus | =8.1 | |
| Redhat Enterprise Linux Eus | =8.2 | |
| Redhat Enterprise Linux Eus | =8.4 | |
| Redhat Enterprise Linux Eus | =8.6 | |
| Redhat Enterprise Linux Server Aus | =8.2 | |
| Redhat Enterprise Linux Server Aus | =8.4 | |
| Redhat Enterprise Linux Server Aus | =8.6 | |
| Redhat Enterprise Linux Server Tus | =8.2 | |
| Redhat Enterprise Linux Server Tus | =8.4 | |
| Redhat Enterprise Linux Server Tus | =8.6 | |
| Fedoraproject Fedora | =30 | |
| Apache MINA SSHD | =2.2.0 | |
| FreeBSD FreeBSD | <12.0 | |
| FreeBSD FreeBSD | =12.0 | |
| FreeBSD FreeBSD | =12.0-p1 | |
| FreeBSD FreeBSD | =12.0-p2 | |
| FreeBSD FreeBSD | =12.0-p3 | |
| Fujitsu M10-1 Firmware | <xcp2361 | |
| Fujitsu M10-1 | ||
| Fujitsu M10-4 Firmware | <xcp2361 | |
| Fujitsu M10-4 | ||
| Fujitsu M10-4s Firmware | <xcp2361 | |
| Fujitsu M10-4s | ||
| Fujitsu M12-1 Firmware | <xcp2361 | |
| Fujitsu M12-1 | ||
| Fujitsu M12-2 Firmware | <xcp2361 | |
| Fujitsu M12-2 | ||
| Fujitsu M12-2s Firmware | <xcp2361 | |
| Fujitsu M12-2s | ||
| Fujitsu M10-1 Firmware | <xcp3070 | |
| Fujitsu M10-4 Firmware | <xcp3070 | |
| Fujitsu M10-4s Firmware | <xcp3070 | |
| Fujitsu M12-1 Firmware | <xcp3070 | |
| Fujitsu M12-2 Firmware | <xcp3070 | |
| Fujitsu M12-2s Firmware | <xcp3070 | |
| Siemens Scalance X204rna Firmware | <3.2.7 | |
| Siemens Scalance X204rna | ||
| Siemens Scalance X204rna Eec Firmware | <3.2.7 | |
| Siemens Scalance X204rna Eec | ||
| All of | ||
| Fujitsu M10-1 Firmware | <xcp2361 | |
| Fujitsu M10-1 | ||
| All of | ||
| Fujitsu M10-4 Firmware | <xcp2361 | |
| Fujitsu M10-4 | ||
| All of | ||
| Fujitsu M10-4s Firmware | <xcp2361 | |
| Fujitsu M10-4s | ||
| All of | ||
| Fujitsu M12-1 Firmware | <xcp2361 | |
| Fujitsu M12-1 | ||
| All of | ||
| Fujitsu M12-2 Firmware | <xcp2361 | |
| Fujitsu M12-2 | ||
| All of | ||
| Fujitsu M12-2s Firmware | <xcp2361 | |
| Fujitsu M12-2s | ||
| All of | ||
| Fujitsu M10-1 Firmware | <xcp3070 | |
| Fujitsu M10-1 | ||
| All of | ||
| Fujitsu M10-4 Firmware | <xcp3070 | |
| Fujitsu M10-4 | ||
| All of | ||
| Fujitsu M10-4s Firmware | <xcp3070 | |
| Fujitsu M10-4s | ||
| All of | ||
| Fujitsu M12-1 Firmware | <xcp3070 | |
| Fujitsu M12-1 | ||
| All of | ||
| Fujitsu M12-2 Firmware | <xcp3070 | |
| Fujitsu M12-2 | ||
| All of | ||
| Fujitsu M12-2s Firmware | <xcp3070 | |
| Fujitsu M12-2s | ||
| All of | ||
| Siemens Scalance X204rna Firmware | <3.2.7 | |
| Siemens Scalance X204rna | ||
| All of | ||
| Siemens Scalance X204rna Eec Firmware | <3.2.7 | |
| Siemens Scalance X204rna Eec | ||
| debian/openssh | 1:8.4p1-5+deb11u3 1:9.2p1-2+deb12u3 1:9.9p1-3 |
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Reference Links
- https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c
- https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
- https://www.exploit-db.com/exploits/46193/
- http://www.securityfocus.com/bid/106741
- https://usn.ubuntu.com/3885-1/
- https://www.debian.org/security/2019/dsa-4387
- https://security.netapp.com/advisory/ntap-20190213-0001/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W3YVQ2BPTOVDCFDVNC2GGF5P5ISFG37G/
- https://security.gentoo.org/glsa/201903-16
- https://bugzilla.redhat.com/show_bug.cgi?id=1677794
- https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
- http://www.openwall.com/lists/oss-security/2019/04/18/1
- https://usn.ubuntu.com/3885-2/
- https://lists.apache.org/thread.html/c45d9bc90700354b58fb7455962873c44229841880dcb64842fa7d23@%3Cdev.mina.apache.org%3E
- https://lists.apache.org/thread.html/c7301cab36a86825359e1b725fc40304d1df56dc6d107c1fe885148b@%3Cdev.mina.apache.org%3E
- https://lists.apache.org/thread.html/e47597433b351d6e01a5d68d610b4ba195743def9730e49561e8cf3f@%3Cdev.mina.apache.org%3E
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.html
- https://www.freebsd.org/security/advisories/FreeBSD-EN-19:10.scp.asc
- https://lists.apache.org/thread.html/d540139359de999b0f1c87d05b715be4d7d4bec771e1ae55153c5c7a@%3Cdev.mina.apache.org%3E
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://access.redhat.com/errata/RHSA-2019:3702
- http://www.openwall.com/lists/oss-security/2022/08/02/1
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://launchpad.net/bugs/cve/CVE-2019-6111
- https://sintonen.fi/advisories/scp-name-validator.patch
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1666128
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1666127#c2
- https://access.redhat.com/security/cve/cve-2019-6111
- https://bugzilla.redhat.com/show_bug.cgi?id=1666127
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3YVQ2BPTOVDCFDVNC2GGF5P5ISFG37G/
- 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/e47597433b351d6e01a5d68d610b4ba195743def9730e49561e8cf3f%40%3Cdev.mina.apache.org%3E
- https://lists.apache.org/thread.html/d540139359de999b0f1c87d05b715be4d7d4bec771e1ae55153c5c7a%40%3Cdev.mina.apache.org%3E
- https://github.com/openssh/openssh-portable/commit/391ffc4b9d31fa1f4ad566499fef9176ff8a07dc
- https://github.com/openssh/openssh-portable/commit/3d896c157c722bc47adca51a58dca859225b5874
- https://security-tracker.debian.org/tracker/CVE-2019-6111
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6111
- https://nvd.nist.gov/vuln/detail/CVE-2019-6111
- https://ubuntu.com/security/CVE-2019-6111
Frequently Asked Questions
What is CVE-2019-6111?
CVE-2019-6111 is a vulnerability in OpenSSH that allows directory traversal attacks during file transfers using scp.
What is the severity of CVE-2019-6111?
CVE-2019-6111 has a severity score of 5.9, which is considered medium.
How does CVE-2019-6111 impact OpenSSH?
CVE-2019-6111 allows an attacker to potentially overwrite or retrieve arbitrary files on the server through scp file transfers.
Which versions of OpenSSH are affected by CVE-2019-6111?
OpenSSH versions 7.9 and prior are affected by CVE-2019-6111.
Is there a fix for CVE-2019-6111?
Yes, updating to OpenSSH version 7.9p1-10+deb10u2 or later will fix the vulnerability.
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