ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2019-6109

An issue was discovered in OpenSSH 7.9.

Published Jan 31, 2019 · catalog updated Oct 14, 2026 · OpenBSD

Patch now

CVE-2019-6109 is in the CISA known-exploited catalog. Confirm OpenBSD against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Medium6.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
3.81%
Remediation
Remediation guidance
Affected products
cpe canonical/ubuntu linux · cpe debian/debian linux · cpe fedoraproject/fedora · cpe netapp/element software · cpe openbsd/openssh · cpe redhat/enterprise linux

An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe canonical/ubuntu linux14.04
  • cpe canonical/ubuntu linux16.04
  • cpe canonical/ubuntu linux18.04
  • cpe canonical/ubuntu linux18.10
  • cpe debian/debian linux8.0
  • cpe debian/debian linux9.0
  • cpe fedoraproject/fedora30
  • cpe netapp/element softwareversion unspecified
  • cpe openbsd/opensshversion unspecified
  • cpe redhat/enterprise linux8.0
  • cpe siemens/scalance x204rna firmwareversion unspecified
  • cpe winscp/winscpversion unspecified
  • vendor OpenBSD opensshversion unspecified

How to fix CVE-2019-6109

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2019-6109 is in the CISA known-exploited catalog. Confirm OpenBSD against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with canonical/ubuntu linux 14.04; canonical/ubuntu linux 16.04; canonical/ubuntu linux 18.04; canonical/ubuntu linux 18.10. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

CWE-116. EPSS 3.81%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 31, 2019 · NIST NVD

    Detected

    An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.

  2. Jul 19, 2020 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  3. Oct 14, 2026 · NIST NVD

    Updated

    An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.

Sources

  • CVE.orgVulnerability recordCVE-2019-6109

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2019-6109

    30-day exploitation probability 3.8%

    first.org
  • NIST NVDVulnerability recordCVE-2019-6109

    An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2019-6109

    An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.