CVE-2020-21047 : Vulnerability Insights and Analysis

A denial-of-service vulnerability in the libcpu component of elfutils version 0.177 can lead to application crashes due to out-of-bounds write, off-by-one error, and reachable assertion.

Understanding CVE-2020-21047

This CVE involves a vulnerability in the libcpu component of elfutils version 0.177, leading to denial-of-service attacks.

What is CVE-2020-21047?

The vulnerability is caused by out-of-bounds write, off-by-one error, and reachable assertion, requiring attackers to craft specific ELF files to exploit it.

The Impact of CVE-2020-21047

Attackers can cause application crashes and denial-of-service by exploiting this vulnerability.

Technical Details of CVE-2020-21047

The technical aspects of the vulnerability in elfutils version 0.177.

Vulnerability Description

Type: Denial-of-Service
Causes: Out-of-bounds write, off-by-one error, reachable assertion

Affected Systems and Versions

Vendor: n/a
Product: n/a
Version: 0.177 (git 47780c9e)
Status: Affected

Exploitation Mechanism

Attackers need to craft specific ELF files to bypass missing bound checks and trigger application crashes.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2020-21047.

Immediate Steps to Take

Update elfutils to a patched version.
Implement proper input validation to prevent crafted ELF files from causing harm.

Long-Term Security Practices

Regularly update software components to address known vulnerabilities.
Conduct security assessments to identify and remediate potential weaknesses.

Patching and Updates

Apply security patches promptly to mitigate the risk of exploitation.