CVE-2019-17266 Explained : Impact and Mitigation

A heap-based buffer over-read vulnerability in libsoup versions 2.65.1 to 2.68.1 allows attackers to exploit the lack of proper length verification in the soup_ntlm_parse_challenge() function.

Understanding CVE-2019-17266

What is CVE-2019-17266?

This CVE identifies a vulnerability in libsoup versions 2.65.1 to 2.68.1 due to improper length verification in the soup_ntlm_parse_challenge() function.

The Impact of CVE-2019-17266

The vulnerability can lead to a heap-based buffer over-read, potentially enabling attackers to execute arbitrary code or cause a denial of service.

Technical Details of CVE-2019-17266

Vulnerability Description

The issue arises from a lack of proper length verification in the soup_ntlm_parse_challenge() function, allowing an attacker to exploit a heap-based buffer over-read.

Affected Systems and Versions

Versions 2.65.1 to 2.68.1 of libsoup are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating an NTLM message to trigger a memcpy operation.

Mitigation and Prevention

Immediate Steps to Take

Update libsoup to a non-vulnerable version.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.

Patching and Updates

Apply patches provided by the vendor to address the vulnerability in libsoup.