CVE-2018-19842 : Vulnerability Insights and Analysis

Radare2 before version 3.1.0 is vulnerable to a denial of service attack due to a stack-based buffer over-read in the getToken function.

Understanding CVE-2018-19842

This CVE entry describes a vulnerability in the radare2 software that could be exploited by attackers to cause a denial of service.

What is CVE-2018-19842?

The getToken function in radare2's libr/asm/p/asm_x86_nz.c allows attackers to trigger a denial of service attack through a stack-based buffer over-read by providing specially crafted x86 assembly data, as demonstrated by the use of rasm2.

The Impact of CVE-2018-19842

The vulnerability can be exploited by attackers to disrupt the normal operation of the software, potentially leading to service unavailability.

Technical Details of CVE-2018-19842

Radare2 versions prior to 3.1.0 are affected by this vulnerability.

Vulnerability Description

The getToken function in libr/asm/p/asm_x86_nz.c in radare2 versions before 3.1.0 can be exploited by attackers to trigger a denial of service attack through a stack-based buffer over-read.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by providing specially crafted x86 assembly data, such as demonstrated by the use of rasm2.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2018-19842.

Immediate Steps to Take

Update radare2 to version 3.1.0 or later to eliminate the vulnerability.
Monitor for any unusual activity that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software and apply patches to address known vulnerabilities.
Implement strong input validation mechanisms to prevent buffer over-read vulnerabilities.

Patching and Updates

Ensure that radare2 is regularly updated to the latest version to patch known security issues.