CVE-2018-19843 : Security Advisory and Response

A buffer over-read vulnerability in the opmov function within radare2 prior to version 3.1.0 can lead to a denial of service when exploited by attackers through crafted x86 assembly data.

Understanding CVE-2018-19843

This CVE involves a specific vulnerability in radare2 that can be abused to cause a denial of service.

What is CVE-2018-19843?

The vulnerability exists in the opmov function within the libr/asm/p/asm_x86_nz.c file in radare2 before version 3.1.0. Attackers can exploit this issue using specially crafted x86 assembly data, such as with the rasm2 tool, resulting in a denial of service.

The Impact of CVE-2018-19843

Exploitation of this vulnerability can lead to a denial of service condition, potentially disrupting the normal operation of the affected system.

Technical Details of CVE-2018-19843

This section provides more technical insights into the vulnerability.

Vulnerability Description

The buffer over-read vulnerability in the opmov function within radare2 before version 3.1.0 allows attackers to trigger a denial of service by utilizing malicious x86 assembly data.

Affected Systems and Versions

Systems running radare2 versions prior to 3.1.0 are vulnerable to this issue.

Exploitation Mechanism

Attackers can exploit this vulnerability by using specifically crafted x86 assembly data, like the rasm2 tool, to trigger the buffer over-read and cause a denial of service.

Mitigation and Prevention

Protecting systems from CVE-2018-19843 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update radare2 to version 3.1.0 or newer to mitigate the vulnerability.
Monitor for any unusual activities that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software and apply patches promptly to address known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Ensure that all systems are regularly updated with the latest security patches to prevent exploitation of known vulnerabilities.