CVE-2019-6111
5.9 · MEDIUMOverview
CVE-2019-6111 is a medium-severity vulnerability affecting openbsd openssh. 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 and patches from openbsd. Update openssh to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| openbsd | openssh | 0 | Affected |
| winscp | winscp | 0 | Affected |
| freebsd | freebsd | >= 0, < 12.0 | Affected |
| fujitsu | m10-1_firmware | >= 0, < xcp2361 | Affected |
| fujitsu | m10-4_firmware | >= 0, < xcp2361 | Affected |
| fujitsu | m10-4s_firmware | >= 0, < xcp2361 | Affected |
| fujitsu | m12-1_firmware | >= 0, < xcp2361 | Affected |
| fujitsu | m12-2_firmware | >= 0, < xcp2361 | Affected |
References
Frequently Asked Questions
What is CVE-2019-6111?
CVE-2019-6111 is a medium-severity vulnerability affecting openbsd openssh. 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 and patches from openbsd. Update openssh to the latest patched version. 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's AI-powered security agents can automatically detect CVE-2019-6111 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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