CVE-2019-14889 : Exploit Details and Defense Strategies

CVE-2019-14889 is a vulnerability found in the libssh API function ssh_scp_new() in versions prior to 0.9.3 and 0.8.8. This vulnerability allows attackers to insert unauthorized commands, potentially compromising the remote target.

Understanding CVE-2019-14889

This CVE identifies a security flaw in the libssh library that could be exploited by malicious actors to execute unauthorized commands on the server.

What is CVE-2019-14889?

The vulnerability in the libssh API function ssh_scp_new() allows attackers to manipulate parameters, enabling the insertion of unauthorized commands during the SCP client-server connection.

The Impact of CVE-2019-14889

Exploiting this vulnerability could lead to the compromise of the remote target, potentially resulting in unauthorized access and control over the affected system.

Technical Details of CVE-2019-14889

The technical details of CVE-2019-14889 shed light on the specific aspects of the vulnerability.

Vulnerability Description

The vulnerability arises from the improper handling of user-provided paths in the libssh SCP client, allowing attackers to execute unauthorized commands.

Affected Systems and Versions

Vendor: Red Hat
Product: libssh
Affected Versions: All libssh versions before 0.9.3 and 0.8.8

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the third parameter of the ssh_scp_new() function, enabling the insertion of unauthorized commands during the SCP client-server connection.

Mitigation and Prevention

Protecting systems from CVE-2019-14889 requires immediate action and long-term security practices.

Immediate Steps to Take

Update libssh to version 0.9.3 or later to mitigate the vulnerability.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and audit system logs for any suspicious activities.
Educate users on safe computing practices and the importance of verifying commands before execution.

Patching and Updates

Apply security patches provided by the vendor promptly to address known vulnerabilities and enhance system security.