CVE-2019-6111
However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented).
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 58.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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).
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 58.20% probability · 99th percentile
- Public exploits
- 2 in Exploit-DB · first 11 January 2019
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- openbsd/openssh · winscp/winscp · canonical/ubuntu linux · debian/debian linux · redhat/enterprise linux · redhat/enterprise linux eus · redhat/enterprise linux server aus · redhat/enterprise linux server tus · fedoraproject/fedora · apache/mina sshd · freebsd/freebsd · fujitsu/m10-1 firmware · fujitsu/m10-4 firmware · fujitsu/m10-4s firmware · fujitsu/m12-1 firmware · fujitsu/m12-2 firmware · fujitsu/m12-2s firmware · siemens/scalance x204rna firmware · siemens/scalance x204rna eec firmware
- Source
- cve@mitre.org
EPSS 58.2% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (2)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.htmlBroken Link
- http://www.openwall.com/lists/oss-security/2019/04/18/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/08/02/1Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/106741Broken Link, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:3702Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1677794Exploit, Issue Tracking, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfThird Party Advisory
- https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.cRelease Notes
- 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.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3YVQ2BPTOVDCFDVNC2GGF5P5ISFG37G/
- https://security.gentoo.org/glsa/201903-16Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190213-0001/Third Party Advisory
- https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txtThird Party Advisory
- https://usn.ubuntu.com/3885-1/Third Party Advisory
- https://usn.ubuntu.com/3885-2/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4387Third Party Advisory
- https://www.exploit-db.com/exploits/46193/Exploit, Third Party Advisory, VDB Entry
- https://www.freebsd.org/security/advisories/FreeBSD-EN-19:10.scp.ascThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.htmlPatch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.htmlBroken Link
- http://www.openwall.com/lists/oss-security/2019/04/18/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/08/02/1Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/106741Broken Link, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:3702Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1677794Exploit, Issue Tracking, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.