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CVE-2019-6109

Published: 14 January 2019

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.

Notes

AuthorNote
seth-arnold
openssh-ssh1 is provided for compatibility with old devices that
cannot be upgraded to modern protocols. Thus we may not provide security
support for this package if doing so would prevent access to equipment.
mdeslaur
The recommended workaround for this issue is to switch to using
sftp instead of scp.

The updates in USN-3885-1 inverted two CVE numbers by accident.

Priority

Medium

Cvss 3 Severity Score

6.8

Score breakdown

Status

Package Release Status
openssh-ssh1
Launchpad, Ubuntu, Debian
groovy Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
bionic Needs triage

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Needs triage

hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Needs triage

trusty Does not exist

upstream Ignored
(frozen on openssh 7.5p)
xenial Does not exist

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
openssh
Launchpad, Ubuntu, Debian
impish
Released (1:7.9p1-6)
groovy
Released (1:7.9p1-6)
hirsute
Released (1:7.9p1-6)
kinetic
Released (1:7.9p1-6)
bionic
Released (1:7.6p1-4ubuntu0.2)
cosmic
Released (1:7.7p1-4ubuntu0.2)
disco
Released (1:7.9p1-6)
eoan
Released (1:7.9p1-6)
focal
Released (1:7.9p1-6)
jammy
Released (1:7.9p1-6)
lunar
Released (1:7.9p1-6)
trusty
Released (1:6.6p1-2ubuntu2.12)
upstream
Released (1:7.9p1-6, 1:6.7p1-5+deb8y8, 1:7.4p1-10+deb9u4)
xenial
Released (1:7.2p2-4ubuntu2.7)
mantic
Released (1:7.9p1-6)
Patches:
upstream: https://github.com/openssh/openssh-portable/commit/8976f1c4b2721c26e878151f52bdf346dfe2d54c
upstream: https://github.com/openssh/openssh-portable/commit/bdc6c63c80b55bcbaa66b5fde31c1cb1d09a41eb

Severity score breakdown

Parameter Value
Base score 6.8
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N