CVE-2019-7147 : Vulnerability Insights and Analysis

Nasm, the Netwide Assembler, version 2.14rc16, contains a buffer over-read vulnerability that can lead to denial-of-service attacks.

Understanding CVE-2019-7147

What is CVE-2019-7147?

The vulnerability exists in the function crc64ib within the crc64.c file of the nasmlib in Netwide Assembler (NASM) 2.14rc16. It can be exploited by a specially crafted assembly input, resulting in segmentation faults and denial-of-service conditions.

The Impact of CVE-2019-7147

Exploiting this vulnerability can lead to denial-of-service attacks by causing segmentation faults in the NASM software.

Technical Details of CVE-2019-7147

Vulnerability Description

A buffer over-read vulnerability in the function crc64ib within the crc64.c file of the nasmlib in NASM 2.14rc16 can be triggered by a crafted assembly input, leading to denial-of-service conditions.

Affected Systems and Versions

Product: Nasm
Vendor: N/a
Version: 2.14rc16

Exploitation Mechanism

The vulnerability can be exploited by using a specially crafted assembly input to trigger the buffer over-read, resulting in segmentation faults and denial-of-service.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest patches or updates provided by NASM to address the vulnerability.
Avoid running NASM with untrusted or unknown assembly inputs.

Long-Term Security Practices

Regularly update NASM to the latest version to ensure all security patches are applied.
Conduct security assessments and code reviews to identify and address vulnerabilities proactively.

Patching and Updates

Ensure that NASM is regularly updated with the latest patches and security fixes to mitigate the risk of exploitation.