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Improper Encoding or Escaping of Output Affecting openssh package, versions <1:7.9p1-6

Severity

 Recommended
0.0
medium
0
10

Based on Ubuntu security rating

    Threat Intelligence

    EPSS
    0.22% (60th percentile)

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  • Snyk ID SNYK-UBUNTU2004-OPENSSH-580699
  • published 15 Jan 2019
  • disclosed 31 Jan 2019
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Introduced: 15 Jan 2019

CVE-2019-6109 Open this link in a new tab
CWE-116 Open this link in a new tab

How to fix?

Upgrade Ubuntu:20.04 openssh to version 1:7.9p1-6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh package and not the openssh package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1
Expand this section

NVD

6.8 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    None