CVE-2019-3859 : Exploit Details and Defense Strategies
Discover the impact of CVE-2019-3859 found in libssh2 versions before 1.8.1. Learn about the vulnerability, affected systems, exploitation risks, and mitigation steps.
A vulnerability was found in the versions of libssh2 prior to 1.8.1, allowing a remote attacker to potentially execute a Denial of Service attack or access confidential information stored in the client's memory.
Understanding CVE-2019-3859
This CVE involves a flaw in libssh2 versions before 1.8.1 that could be exploited by a remote attacker.
What is CVE-2019-3859?
An out of bounds read flaw in the _libssh2_packet_require and _libssh2_packet_requirev functions could lead to a Denial of Service or unauthorized data access.
The Impact of CVE-2019-3859
The vulnerability has a CVSS base score of 5.0, with a medium severity rating. It requires user interaction and can result in a Denial of Service or memory data leakage.
Technical Details of CVE-2019-3859
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The flaw in libssh2 versions before 1.8.1 allows a remote attacker to exploit out of bounds read issues, potentially leading to a Denial of Service or memory data exposure.
Affected Systems and Versions
- Product: libssh2
- Vendor: The libssh2 Project
- Affected Version: 1.8.1
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Network
- Privileges Required: None
- User Interaction: Required
- Scope: Unchanged
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: Low
Mitigation and Prevention
Protecting systems from CVE-2019-3859 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update libssh2 to version 1.8.1 or later.
- Monitor for any unusual network activity.
- Implement network segmentation to limit the impact of potential attacks.
Long-Term Security Practices
- Regularly update software and apply security patches.
- Conduct security training for users to recognize and report suspicious activities.
- Employ network monitoring tools to detect and respond to security incidents.
Patching and Updates
- Stay informed about security advisories and updates from libssh2 and related vendors.