CVE-2019-6110Openssh Vulnerability
In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files being transferred.
Published Jan 31, 2019 · Updated Oct 16, 2026 · Also known as DEBIAN-CVE-2019-6110, UBUNTU-CVE-2019-6110
Key Facts
Patch immediately- CVE-2019-6110 is a medium-severity vulnerability (CVSS 6.8 v3.1) affecting Element Software (Netapp), Ontap Select Deploy (Netapp), Storage Automation Store (Netapp) and 16 more products.
- It is exploited in the wild, listed in Industry KEV feed since Jul 19, 2020. A public exploit is reported by tracking sources, but no code link is listed yet.
- EPSS estimates a 25% probability of exploitation in the next 30 days.
- Fixed versions are available, including Openssh <=7.9, Openssh 1:9.2p1-2+deb12u6, Openssh 6.6p1-36.12.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
6.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS (30-day exploit likelihood)
25%
Higher than 97.8% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
43/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Jul 19, 2020
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
3
Proof-of-concept links
In-the-wild evidence
4
Reports of active use
Advisories And Exploit References
Description
In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files being transferred.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jul 19, 2020 | n/a | Not reported |
Affected Products
151 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Element SoftwareNetapp | See advisory | n/a |
| Ontap Select DeployNetapp | See advisory | n/a |
| Storage Automation StoreNetapp | See advisory | n/a |
| OpensshOpenbsd | See advisory | 7.9 |
| WinscpWinscp | See advisory | 5.13 |
Patched Releases
Openssh
<=7.9, 1:9.2p1-2+deb12u6, 6.6p1-36.12.1, 6.6p1-54.26.1, 7.2p2-29.1, 7.2p2-74.35.1, 7.4p1-10.ph1, 7.5p1-14.ph2, 7.6p1-9.13.1, 7.6p1-lp150.8.9.1, 7.8p1-4.ph3, 8.4p1-7.4
openssh-askpass-gnome
6.6p1-36.12.1, 6.6p1-54.26.1, 7.2p2-29.1, 7.2p2-74.35.1, 7.6p1-9.13.1, 7.6p1-lp150.8.9.1
openssh-cavs
7.2p2-29.1, 7.6p1-lp150.8.9.1, 8.4p1-7.4
openssh-clients
8.4p1-7.4
openssh-common
8.4p1-7.4
openssh-fips
6.6p1-36.12.1, 6.6p1-54.26.1, 7.2p2-29.1, 7.2p2-74.35.1, 7.6p1-9.13.1, 7.6p1-lp150.8.9.1, 8.4p1-7.4
openssh-helpers
6.6p1-36.12.1, 6.6p1-54.26.1, 7.2p2-29.1, 7.2p2-74.35.1, 7.6p1-9.13.1, 7.6p1-lp150.8.9.1, 8.4p1-7.4
openssh-server
8.4p1-7.4
Scalance X204rna Eec Firmware
3.2.7
Scalance X204rna Firmware
3.2.7
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
V3.1.5
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
V3.1.5
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
V3.1.5
Winscp
<=5.13
Timeline
Publicly disclosed
Jan 31, 2019
Added to Industry KEV feed
Jul 19, 2020
Last updated
Oct 16, 2026
Weakness Type
- CWE-451 User Interface (UI) Misrepresentation of Critical Information
- CWE-838 Inappropriate Encoding for Output Context
References
- advisorysecurity-tracker.debian.org · CVE-2019-6110
- advisoryubuntu.com · CVE-2019-6110
- advisorycve.org · CVERecord
- advisorybugzilla.suse.com · 1121571
- advisorybugzilla.suse.com · 1121816
FAQ
Common Questions.
In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files being transferred.
Affected: Element Software (Netapp); Ontap Select Deploy (Netapp); Storage Automation Store (Netapp), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Jul 19, 2020.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
A public exploit is reported by tracking sources, but no code link is listed yet.
Fixed versions are available, including Openssh <=7.9, Openssh 1:9.2p1-2+deb12u6, Openssh 6.6p1-36.12.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2019-6110 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
Request A Demo