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CVE-2019-6111

5.9 · MEDIUM

An issue was discovered in OpenSSH 7.9.

Published Jan 31, 2019CWE-22EPSS 58.20%

Overview

CVE-2019-6111 is a medium-severity vulnerability. It was published on January 31, 2019 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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).

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-security-announce/2019-06/msg00058.htmlRefwww.openwall.com/lists/oss-security/2019/04/18/1Refwww.openwall.com/lists/oss-security/2022/08/02/1Refwww.securityfocus.com/bid/106741Refaccess.redhat.com/errata/RHSA-2019:3702Refbugzilla.redhat.com/show_bug.cgi?id=1677794Refcert-portal.siemens.com/productcert/pdf/ssa-412672.pdfRefcvsweb.openbsd.org/src/usr.bin/ssh/scp.cReflists.apache.org/thread.html/c45d9bc90700354b58fb7455962873c44229841880dcb64842fa7d23%40%3Cdev.mina.apache.org%3EReflists.apache.org/thread.html/c7301cab36a86825359e1b725fc40304d1df56dc6d107c1fe885148b%40%3Cdev.mina.apache.org%3E

How CyberStrike helps

Frequently asked questions

What is CVE-2019-6111?

CVE-2019-6111 is a medium-severity vulnerability. It was published on January 31, 2019 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2019-6111?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-6111?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-6111?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-6111 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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