CVE-2019-6109 — An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display...
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.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 3.8% (30-day exploitation probability)+13
- Technical severity (medium)+3
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
CISA SSVC assessment CISA
Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
- Documented patch — cert-portal.siemens.com (NIST National Vulnerability Database)
- Documented patch — www.oracle.com (NIST National Vulnerability Database)
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora…).
- The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
- Apply the fixed version or the patch documented under Remediation.
- Exploitation requires user interaction: tighten email/web filtering and warn affected users.
- Search available logs for exploit probes matching the vulnerability class (input validation), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Canonical | Ubuntu Linux | version 14.04version 16.04version 18.04version 18.10 | Vulnerable | NIST National Vulnerability Database |
| Debian | Debian Linux | version 8.0version 9.0 | Vulnerable | NIST National Vulnerability Database |
| Fedoraproject | Fedora | version 30 | Vulnerable | NIST National Vulnerability Database |
| Fujitsu | M10-1 Firmware | < xcp3070< xcp2361 | Vulnerable | NIST National Vulnerability Database |
| Fujitsu | M10-4 Firmware | < xcp3070< xcp2361 | Vulnerable | NIST National Vulnerability Database |
| Fujitsu | M10-4s Firmware | < xcp3070< xcp2361 | Vulnerable | NIST National Vulnerability Database |
| Fujitsu | M12-1 Firmware | < xcp3070< xcp2361 | Vulnerable | NIST National Vulnerability Database |
| Fujitsu | M12-2 Firmware | < xcp3070< xcp2361 | Vulnerable | NIST National Vulnerability Database |
| Fujitsu | M12-2s Firmware | < xcp3070< xcp2361 | Vulnerable | NIST National Vulnerability Database |
| Netapp | Element Software | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Ontap Select Deploy | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Storage Automation Store | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Openbsd | Openssh | ≤ 7.9 | Vulnerable | NIST National Vulnerability Database |
| Red Hat | Enterprise Linux | version 8.0 | Vulnerable | NIST National Vulnerability Database |
| Red Hat | Enterprise Linux Eus | version 8.6version 8.4version 8.2version 8.1 | Vulnerable | NIST National Vulnerability Database |
| Red Hat | Enterprise Linux Server Aus | version 8.6version 8.4version 8.2 | Vulnerable | NIST National Vulnerability Database |
| Red Hat | Enterprise Linux Server Tus | version 8.6version 8.4version 8.2 | Vulnerable | NIST National Vulnerability Database |
| Siemens | Scalance X204rna Eec Firmware | < 3.2.7 | Vulnerable | NIST National Vulnerability Database |
| Siemens | Scalance X204rna Firmware | < 3.2.7 | Vulnerable | NIST National Vulnerability Database |
| Winscp | Winscp | ≤ 5.13 | Vulnerable | NIST National Vulnerability Database |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 6.8 | CVSS 3.1 | Medium | 1.6 | 5.2 | nvd@nist.gov via NIST National Vulnerability Database |
| 6.8 | CVSS 3.1 | Medium | 1.6 | 5.2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database |
| 6.8 | CVSS 3.1 | Medium | — | — | CISA-ADP via CVE Program (cve.org) e CISA ADP |
| 6.8 | CVSS 3.0 | Medium | — | — | GitHub, Inc. via GitHub Security Advisories |
| 4.0 | CVSS 2.0 | Medium | 4.9 | 4.9 | nvd@nist.gov via NIST National Vulnerability Database |
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N (score shown at the top: nvd@nist.gov) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
EPSS over time FIRST
Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 3.81%
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Timeline
What happened to this CVE, newest first.
- 2026
- SSVC assessment updated
- Record published
- Fix documented
- Affected products added · openbsd/openssh, winscp/winscp, canonical/ubuntu linux, debian/debian linux, netapp/element software, netapp/ontap selec
- CVSS changed · 6.8
- Source status changed · → Modified
- Record created in this database
- 2019
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 2× References added · Oct 14, 2026 – Oct 14, 2026
- 1× Official description updated · Oct 14, 2026 – Oct 14, 2026
References
21 on the record
- cvsweb.openbsd.org/src/usr.bin/ssh/scp.c
- cvsweb.openbsd.org/src/usr.bin/ssh/progressmeter.c
- www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- lists.debian.org/debian-lts-announce/2019/03/msg00030.html
- security.netapp.com/advisory/ntap-20190213-0001
- www.debian.org/security/2019/dsa-4387
- security.netapp.com/advisory/ntap-20190213-0001/
- lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.html
- sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
- cert-portal.siemens.com/productcert/html/ssa-412672.html
- usn.ubuntu.com/3885-1
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W3YVQ2
- security.gentoo.org/glsa/201903-16
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3YV
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3YV
- github.com/advisories/GHSA-2pqm-q853-jfvf
- cert-portal.siemens.com/productcert/html/ssa-398330.html
- nvd.nist.gov/vuln/detail/CVE-2019-6109
- access.redhat.com/errata/RHSA-2019:3702
- usn.ubuntu.com/3885-1/
Elsewhere on this site
Related CVEs (same products)
- High CVE-2026-106583 In ssh in OpenSSH before 10.6, a $ or \ character can occur in a command-line username, leading... 8d
- Low CVE-2026-106589 In sshd in OpenSSH through 10.6, in certain environments such as QNX 6 and SCO… 8d
- Low CVE-2026-106587 Type Confusion in Openbsd Openssh 8d
- Low CVE-2026-106588 In sshd in OpenSSH through 10.6, use of the macOS 27 (or later) SDK has the side effect… 8d
- Low CVE-2026-106582 In sshd and ssh in OpenSSH before 10.6, an LZ77 dictionary coder can be used even though… 9d
- High CVE-2026-106555 Incorrect Resource Transfer Between Spheres in Openbsd Openssh 9d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2019-6109 is "An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display...", rated Medium. It affects Ubuntu Linux (Canonical); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.8 describes technical severity. EPSS 3.81% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
Comments
Moderated technical discussion. Read the community guidelines.
No comments yet.
Sign in or create an account to comment and suggest corrections.