CVE-2018-11743 : Security Advisory and Response

A vulnerability in mruby version 1.4.1 could allow attackers to launch a denial of service attack or cause other unspecified consequences.

Understanding CVE-2018-11743

This CVE involves a potential denial of service vulnerability in the init_copy function of mruby version 1.4.1.

What is CVE-2018-11743?

The function init_copy in the file kernel.c in mruby version 1.4.1 invokes the method initialize_copy for objects of type TT_ICLASS, which can potentially lead to a denial of service attack or other unspecified consequences.

The Impact of CVE-2018-11743

The vulnerability could result in a denial of service attack due to an uninitialized pointer in mrb_hash_keys or other unspecified impacts.

Technical Details of CVE-2018-11743

This section provides more technical insights into the vulnerability.

Vulnerability Description

The init_copy function in kernel.c in mruby 1.4.1 makes initialize_copy calls for TT_ICLASS objects, allowing attackers to cause a denial of service or other potential impacts.

Affected Systems and Versions

Affected Version: mruby 1.4.1
Systems using mruby version 1.4.1

Exploitation Mechanism

The vulnerability arises from the way the init_copy function handles initialize_copy calls for TT_ICLASS objects, potentially leading to a denial of service attack.

Mitigation and Prevention

Protecting systems from CVE-2018-11743 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update mruby to a patched version if available
Monitor for any unusual system behavior

Long-Term Security Practices

Regularly update software and libraries
Implement secure coding practices

Patching and Updates

Apply security patches provided by mruby
Stay informed about security updates and advisories