CVE-2021-20275 : What You Need to Know

A flaw was found in privoxy before version 3.0.32, where an invalid read of size two may occur in chunked_body_is_complete() leading to denial of service.

Understanding CVE-2021-20275

This CVE record identifies a vulnerability in privoxy before version 3.0.32 that could result in denial of service.

What is CVE-2021-20275?

CVE-2021-20275 is a flaw in privoxy that could allow an attacker to trigger an invalid read, potentially leading to denial of service.

The Impact of CVE-2021-20275

The impact of this vulnerability is the denial of service against systems running affected versions of privoxy.

Technical Details of CVE-2021-20275

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in privoxy allows for an invalid read of size two, which can be triggered in the chunked_body_is_complete() function.

Affected Systems and Versions

The affected product is privoxy, specifically version 3.0.32.

Exploitation Mechanism

An attacker can exploit this vulnerability by triggering the invalid read of size two in chunked_body_is_complete(), leading to a denial of service.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-20275, users and administrators should take the following steps:

Immediate Steps to Take

Upgrade to a non-vulnerable version of privoxy (3.0.32 or later).
Monitor official sources for patches and updates.

Long-Term Security Practices

Regularly update software to the latest versions.
Implement network security measures to detect and prevent exploitation attempts.

Patching and Updates

Apply patches provided by the vendor promptly to address the vulnerability in privoxy.