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Vulnerability record · CVE-2019-6110 · published 31 January 2019

CVE-2019-6110: Openbsd openssh vulnerability

Openbsd · Openssh

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.

6.8 CVSS 3.1 Medium EPSS 21% · top 2.5% CWE-838 · CWE-838
6.8CVSS 3.1 base score, v2 4.0
21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
14References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf PatchThird Party Advisory
https://cvsweb.openbsd.org/src/usr.bin/ssh/progressmeter.c Release Notes
https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c Release Notes
https://security.gentoo.org/glsa/201903-16 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190213-0001/ Third Party Advisory
https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt Third Party Advisory
https://www.exploit-db.com/exploits/46193/ ExploitThird Party AdvisoryVDB Entry
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf PatchThird Party Advisory
https://cvsweb.openbsd.org/src/usr.bin/ssh/progressmeter.c Release Notes
https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c Release Notes
https://security.gentoo.org/glsa/201903-16 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190213-0001/ Third Party Advisory
https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt Third Party Advisory
https://www.exploit-db.com/exploits/46193/ ExploitThird Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2003-0786Openbsd openssh vulnerabilityThe SSH1 PAM challenge response authentication in OpenSSH 3.7.1 and 3.7.1p1, when Privilege Separation is disabled, does not check the result of the …EPSS 3.6%10.0CVE-2003-0693Openbsd openssh vulnerabilityA "buffer management error" in buffer_append_space of buffer.c for OpenSSH before 3.7 may allow remote attackers to execute arbitrary code by causing…EPSS 11%10.0CVE-2002-0640Openbsd openssh vulnerabilityBuffer overflow in sshd in OpenSSH 2.3.1 through 3.3 may allow remote attackers to execute arbitrary code via a large number of responses during chal…EPSS 27%10.0CVE-2001-0144Openbsd openssh vulnerabilityCORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute arbitrary commands on an SSH server or client via an integer ove…EPSS 32%10.0CVE-2000-0999Openbsd openssh vulnerabilityFormat string vulnerabilities in OpenBSD ssh program (and possibly other BSD-based operating systems) allow attackers to gain root privileges.EPSS 12%10.0CVE-2000-0525Openbsd openssh vulnerabilityOpenSSH does not properly drop privileges when the UseLogin option is enabled, which allows local users to execute arbitrary commands by providing th…EPSS 2.6%9.8CVE-2023-38408OpenSSH ssh-agent PKCS#11 search path flaw enables RCE via agent forwardingThe PKCS#11 support in ssh-agent in OpenSSH before 9.3p2 uses an insufficiently trustworthy search path, so code loaded from locations such as /usr/l…EPSS 80%analysed9.8CVE-2023-28531Openbsd openssh improper access control vulnerabilityssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The earliest affected version is…EPSS 2.3%

Source: NIST National Vulnerability Database (record CVE-2019-6110), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.