Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title libssh vulnerability
Informations
Name USN-4219-1 First vendor Publication 2019-12-10
Vendor Ubuntu Last vendor Modification 2019-12-10
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Overall CVSS Score 8
Base Score 8 Environmental Score 8
impact SubScore 5.9 Temporal Score 8
Exploitabality Sub Score 2.1
 
Attack Vector Network Attack Complexity Low
Privileges Required Low User Interaction Required
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 9.3 Attack Range Network
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.10 - Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

libssh could be made to run programs under certain conditions.

Software Description: - libssh: A tiny C SSH library

Details:

It was discovered that libssh incorrectly handled certain scp commands. If a user or automated system were tricked into using a specially-crafted scp command, a remote attacker could execute arbitrary commands on the server.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.10:
libssh-4 0.9.0-1ubuntu1.3

Ubuntu 19.04:
libssh-4 0.8.6-3ubuntu0.3

Ubuntu 18.04 LTS:
libssh-4 0.8.0~20170825.94fa1e38-1ubuntu0.5

Ubuntu 16.04 LTS:
libssh-4 0.6.3-4.3ubuntu0.5

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4219-1
CVE-2019-14889

Package Information:
https://launchpad.net/ubuntu/+source/libssh/0.9.0-1ubuntu1.3
https://launchpad.net/ubuntu/+source/libssh/0.8.6-3ubuntu0.3
https://launchpad.net/ubuntu/+source/libssh/0.8.0~20170825.94fa1e38-1ubuntu0.5
https://launchpad.net/ubuntu/+source/libssh/0.6.3-4.3ubuntu0.5

Original Source

Url : http://www.ubuntu.com/usn/USN-4219-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-78 Improper Sanitization of Special Elements used in an OS Command ('OS Command Injection') (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 14
Os 4
Os 1
Os 2
Os 1

Alert History

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0
1
Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2020-03-19 13:20:12
  • First insertion