CVE-2019-3822 : Vulnerability Insights and Analysis

CVE-2019-3822 was published on February 6, 2019, and affects the curl project. The vulnerability lies in versions of libcurl from 7.36.0 to 7.64.0, exposing them to a stack-based buffer overflow. This flaw can be exploited by a malicious or malfunctioning HTTP server to execute arbitrary code on the target system.

Understanding CVE-2019-3822

This section provides insights into the nature and impact of the CVE-2019-3822 vulnerability.

What is CVE-2019-3822?

CVE-2019-3822 is a vulnerability in libcurl versions 7.36.0 to 7.64.0 that allows a stack-based buffer overflow, potentially leading to remote code execution.

The Impact of CVE-2019-3822

The vulnerability has a CVSS base score of 7.1, indicating a high severity level. It can result in a denial of service (DoS) due to the overflow, potentially compromising the integrity of the affected system.

Technical Details of CVE-2019-3822

This section delves into the technical aspects of the CVE-2019-3822 vulnerability.

Vulnerability Description

The flaw arises from the incorrect implementation of preventing buffer overflow in the function responsible for creating an outgoing NTLM type-3 header. This allows an attacker to craft a malicious NTLMv2 header, leading to a buffer overflow.

Affected Systems and Versions

Product: curl
Vendor: The curl Project
Versions Affected: 7.36.0 to 7.64.0

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Impact: High availability impact, low integrity impact, no confidentiality impact

Mitigation and Prevention

Learn how to mitigate and prevent the CVE-2019-3822 vulnerability.

Immediate Steps to Take

Update libcurl to a non-vulnerable version (post 7.64.0).
Monitor network traffic for any suspicious activity.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Conduct security audits and penetration testing to identify vulnerabilities.
Educate users on safe browsing habits and the importance of cybersecurity.

Patching and Updates

Stay informed about security advisories from the vendor.
Apply patches and updates as soon as they are released to ensure system security.