CVE-2018-1000005 : What You Need to Know

In versions of libcurl ranging from 7.49.0 to 7.57.0, a vulnerability exists in handling HTTP/2 trailers, leading to an out-of-bounds read. This issue could potentially be exploited for denial-of-service attacks or information disclosure.

Understanding CVE-2018-1000005

What is CVE-2018-1000005?

CVE-2018-1000005 is a vulnerability in libcurl versions 7.49.0 to 7.57.0 related to the handling of HTTP/2 trailers.

The Impact of CVE-2018-1000005

The vulnerability could result in a crash or passing of oversized data to the client write function, potentially enabling denial-of-service attacks or information disclosure.

Technical Details of CVE-2018-1000005

Vulnerability Description

The issue arises from incorrect handling of HTTP/2 trailers in libcurl versions 7.49.0 to 7.57.0.
Changes in code conversion from HTTP/2 trailer data to HTTP/1-like headers led to out-of-bounds reads.

Affected Systems and Versions

Versions affected: 7.49.0 to 7.57.0 of libcurl.

Exploitation Mechanism

Reading an HTTP/2 trailer could corrupt subsequent trailers due to incorrect size calculations.
The vulnerability allows for the passing of oversized data, leading to potential exploits.

Mitigation and Prevention

Immediate Steps to Take

Update libcurl to a non-vulnerable version.
Monitor for any unusual activities that could indicate exploitation.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Implement network monitoring and intrusion detection systems.

Patching and Updates

Apply patches provided by libcurl to address the vulnerability.