CVE-2017-17813 : Security Advisory and Response

Netwide Assembler (NASM) version 2.14rc0 is vulnerable to a use-after-free issue in the pp_list_one_macro function, potentially leading to a denial of service attack when exploited remotely due to mishandling of line-syntax errors.

Understanding CVE-2017-17813

This CVE entry describes a specific vulnerability in NASM version 2.14rc0 that can be exploited to trigger a denial of service attack.

What is CVE-2017-17813?

The function pp_list_one_macro in asm/preproc.c of NASM version 2.14rc0 experiences a use-after-free issue, allowing remote attackers to cause a denial of service by exploiting improper handling of line-syntax errors.

The Impact of CVE-2017-17813

The vulnerability in NASM version 2.14rc0 can be exploited remotely to trigger a denial of service attack, potentially disrupting the normal operation of the affected system.

Technical Details of CVE-2017-17813

Netwide Assembler (NASM) version 2.14rc0 is susceptible to a specific vulnerability that can be further understood through the following technical details:

Vulnerability Description

The use-after-free issue in the pp_list_one_macro function of NASM version 2.14rc0 allows remote attackers to exploit this vulnerability, leading to a denial of service condition due to improper handling of line-syntax errors.

Affected Systems and Versions

Product: Netwide Assembler (NASM)
Version: 2.14rc0

Exploitation Mechanism

The vulnerability can be exploited remotely by manipulating line-syntax errors to trigger the use-after-free issue, resulting in a denial of service attack.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2017-17813, consider the following mitigation strategies:

Immediate Steps to Take

Update NASM to a patched version that addresses the use-after-free vulnerability.
Monitor network traffic for any suspicious activity that could indicate an ongoing attack.

Long-Term Security Practices

Implement secure coding practices to prevent similar vulnerabilities in future software releases.
Regularly update and patch software to mitigate known vulnerabilities.

Patching and Updates

Stay informed about security advisories and updates from NASM to apply patches promptly and enhance system security.