CVE-2019-7733 : Security Advisory and Response

Live555 version 0.95 is vulnerable to a buffer overflow due to a large integer in the Content-Length HTTP header, allowing an attacker to exploit the unrestricted memmove function in handleRequestBytes.

Understanding CVE-2019-7733

Live555 version 0.95 experiences a buffer overflow vulnerability when processing certain HTTP headers.

What is CVE-2019-7733?

This CVE refers to a specific vulnerability in Live555 version 0.95 that allows for a buffer overflow attack through manipulation of the Content-Length HTTP header.

The Impact of CVE-2019-7733

The vulnerability can be exploited by an attacker to potentially execute arbitrary code or crash the application, leading to a denial of service (DoS) condition.

Technical Details of CVE-2019-7733

Live555 version 0.95 vulnerability details.

Vulnerability Description

The issue arises from a buffer overflow triggered by a large integer in the Content-Length HTTP header, which is not properly handled by the memmove function in handleRequestBytes.

Affected Systems and Versions

Live555 version 0.95

Exploitation Mechanism

Attacker crafts a malicious HTTP request with a large integer in the Content-Length header
The vulnerable memmove function in handleRequestBytes processes the request, leading to a buffer overflow

Mitigation and Prevention

Steps to address and prevent the CVE-2019-7733 vulnerability.

Immediate Steps to Take

Update Live555 to a patched version that addresses the buffer overflow vulnerability
Implement network-level protections to filter out potentially malicious HTTP requests

Long-Term Security Practices

Regularly monitor and update software components to ensure vulnerabilities are promptly addressed
Conduct security assessments and code reviews to identify and mitigate similar issues in the future

Patching and Updates

Apply patches provided by Live555 to fix the buffer overflow vulnerability