CVE-2019-6111
openssh - security update
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).
How to fix CVE-2019-6111
To remediate CVE-2019-6111, upgrade the affected package to a fixed version below.
- —upgrade to 2025.89-r0 or later
- —upgrade to 7.9_p1-r3 or later
- —upgrade to 1:7.9p1-9 or later
- —upgrade to 1:7.4p1-10+deb9u6 or later
Is CVE-2019-6111 being exploited?
Likely — EPSS is 54.2%, placing CVE-2019-6111 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (4)
- from 0, < 2025.89-r0
- from 0, < 7.9_p1-r3
- from 0, < 1:7.9p1-9
- from 0, < 1:7.4p1-10+deb9u6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |