CVE-2018-20535 : What You Need to Know

Netwide Assembler (NASM) version 2.14rc16 contains a use-after-free vulnerability in the asm/preproc.c file within the pp_getline function, leading to a denial of service risk.

Understanding CVE-2018-20535

This CVE involves a specific vulnerability in NASM version 2.14rc16 that can be exploited to cause a denial of service.

What is CVE-2018-20535?

The use-after-free vulnerability in NASM version 2.14rc16 allows attackers to trigger a denial of service by manipulating the line number increment process.

The Impact of CVE-2018-20535

Exploiting this vulnerability can result in a denial of service, disrupting the normal operation of the affected NASM version.

Technical Details of CVE-2018-20535

NASM version 2.14rc16 is susceptible to a use-after-free vulnerability in the pp_getline function.

Vulnerability Description

The vulnerability in the asm/preproc.c file of NASM version 2.14rc16 allows for a denial of service attack when attempting to increment the line number.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the line number increment process, causing a denial of service.

Mitigation and Prevention

Steps to address and prevent the exploitation of CVE-2018-20535

Immediate Steps to Take

Update NASM to a patched version that addresses the use-after-free vulnerability.
Monitor for any unusual activity that could indicate an attempted exploit of this vulnerability.

Long-Term Security Practices

Regularly update software and dependencies to mitigate known vulnerabilities.
Implement proper input validation and error handling mechanisms in software development.

Patching and Updates

Apply patches and updates provided by NASM to fix the use-after-free vulnerability in version 2.14rc16.