CVE-2021-42870 : What You Need to Know

ACCEL-PPP 1.12.0 has an out-of-bounds read vulnerability in post_msg when processing a call_clear_request.

Understanding CVE-2021-42870

ACCEL-PPP 1.12.0 has a security vulnerability that could allow an attacker to trigger an out-of-bounds read during the processing of a call_clear_request.

What is CVE-2021-42870?

ACCEL-PPP 1.12.0 is affected by an out-of-bounds read vulnerability in the post_msg function. Exploitation of this vulnerability could potentially lead to arbitrary code execution or denial of service.

The Impact of CVE-2021-42870

This vulnerability could be exploited by an attacker to read beyond the bounds of allocated memory, leading to information disclosure, crashes, or potentially execution of malicious code on the affected system.

Technical Details of CVE-2021-42870

ACCEL-PPP 1.12.0 vulnerability details:

Vulnerability Description

Type: Out-of-bounds read
Component: post_msg
Trigger: Processing a call_clear_request

Affected Systems and Versions

Product: ACCEL-PPP
Version: 1.12.0

Exploitation Mechanism

The vulnerability arises when processing call_clear_request, allowing an attacker to exploit the post_msg function to read outside the bounds of allocated memory.

Mitigation and Prevention

Actions to mitigate and prevent exploitation of CVE-2021-42870:

Immediate Steps to Take

Apply the vendor-supplied patches immediately.
Monitor vendor channels for updates or security advisories.
Restrict network access to the affected system.

Long-Term Security Practices

Regularly update software and firmware to the latest versions.
Perform security assessments and code reviews to identify vulnerabilities.

Patching and Updates

Deploy the latest patches provided by the vendor to remediate the vulnerability.