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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 base score: 6.8

Status

Package Release Status
openssh
Launchpad, Ubuntu, Debian
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)
groovy
Released (1:7.9p1-6)
hirsute
Released (1:7.9p1-6)
impish
Released (1:7.9p1-6)
jammy
Released (1:7.9p1-6)
kinetic
Released (1:7.9p1-6)
precise Ignored
(end of ESM support, was needed)
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)
Patches:
upstream: https://github.com/openssh/openssh-portable/commit/8976f1c4b2721c26e878151f52bdf346dfe2d54c
upstream: https://github.com/openssh/openssh-portable/commit/bdc6c63c80b55bcbaa66b5fde31c1cb1d09a41eb
openssh-ssh1
Launchpad, Ubuntu, Debian
bionic Needs triage

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

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Ignored
(reached end-of-life)
jammy Needs triage

kinetic Needs triage

precise Does not exist

trusty Does not exist

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