HOMEVULNERABILITIESCVE-2019-6109
MEDIUM

CVE-2019-6109

CWE-116Published: January 31, 2019· Updated: Jun 17, 2026

6.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2019-6109 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 6.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
fujitsu12 product(s)
m10-1 firmwarem10-1m10-4 firmwarem10-4m10-4s firmwarem10-4sm12-1 firmwarem12-1m12-2 firmwarem12-2m12-2s firmwarem12-2s
netapp3 product(s)
element softwareontap select deploystorage automation store
openbsd1 product(s)
openssh
Red Hat4 product(s)
enterprise linuxenterprise linux eusenterprise linux server ausenterprise linux server tus
siemens4 product(s)
scalance x204rna firmwarescalance x204rnascalance x204rna eec firmwarescalance x204rna eec
winscp1 product(s)
winscp
Source: NVD CPE · 39 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
PATCHhttps://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
PATCHhttps://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:3702
ADVISORYhttps://cvsweb.openbsd.org/src/usr.bin/ssh/progressmeter.c
ADVISORYhttps://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c
ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
ADVISORYhttps://security.gentoo.org/glsa/201903-16
ADVISORYhttps://security.netapp.com/advisory/ntap-20190213-0001/
ADVISORYhttps://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
ADVISORYhttps://usn.ubuntu.com/3885-1/
ADVISORYhttps://www.debian.org/security/2019/dsa-4387
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:3702
ADVISORYhttps://cvsweb.openbsd.org/src/usr.bin/ssh/progressmeter.c
ADVISORYhttps://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c
ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
ADVISORYhttps://security.gentoo.org/glsa/201903-16
ADVISORYhttps://security.netapp.com/advisory/ntap-20190213-0001/
ADVISORYhttps://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
ADVISORYhttps://usn.ubuntu.com/3885-1/
ADVISORYhttps://www.debian.org/security/2019/dsa-4387

All References (26)

→
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.htmlBroken Link
→
https://access.redhat.com/errata/RHSA-2019:3702Third Party Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfPatch · Third Party Advisory
→
https://cvsweb.openbsd.org/src/usr.bin/ssh/progressmeter.cRelease Notes · Vendor Advisory
→
https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.cRelease Notes · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2019/03/msg00030.htmlMailing List · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3YVQ2BPTOVDCFDVNC2GGF5P5ISFG37G/
→
https://security.gentoo.org/glsa/201903-16Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20190213-0001/Third Party Advisory
→
https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txtThird Party Advisory
→
https://usn.ubuntu.com/3885-1/Third Party Advisory
→
https://www.debian.org/security/2019/dsa-4387Third Party Advisory
→
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.htmlPatch · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.htmlBroken Link
→
https://access.redhat.com/errata/RHSA-2019:3702Third Party Advisory

Quick Facts

CVE IDCVE-2019-6109
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessCWE-116
CISA KEVNo
Affected9 vendor(s)
PublishedJan 31, 2019

Related CVEs (CWE-116)

CVE-2026-48358
10.0
CVE-2025-55729
10.0
CVE-2025-55730
10.0
CVE-2022-26174
9.8
CVE-2018-9246
9.8
CVE-2022-35153
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-6109 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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