CVE-2021-29060 : What You Need to Know

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in Color-String version 1.5.5 and below, allowing crafted invalid HWB strings to cause application issues.

Understanding CVE-2021-29060

This CVE involves a vulnerability in Color-String versions 1.5.5 and earlier due to improper handling of crafted input.

What is CVE-2021-29060?

The CVE-2021-29060 is a Regular Expression Denial of Service (ReDOS) vulnerability in Color-String, triggered by checking invalid HWB strings.

The Impact of CVE-2021-29060

Exploitation of this vulnerability may lead to application crashes, unresponsiveness, or high resource consumption, affecting availability.

Technical Details of CVE-2021-29060

The technical aspects of the CVE, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from the insecure processing of crafted HWB strings, allowing an attacker to cause denial of service through excessive backtracking.

Affected Systems and Versions

Color-String version 1.5.5 and below are affected by this vulnerability, potentially impacting applications that utilize this library.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing specially crafted invalid HWB strings to trigger the ReDOS issue.

Mitigation and Prevention

Key steps to mitigate the CVE-2021-29060 vulnerability and prevent potential exploitation.

Immediate Steps to Take

Update Color-String to a patched version above 1.5.5 to mitigate the ReDOS vulnerability and ensure system security.

Long-Term Security Practices

Implement input validation routines and regular security assessments to detect and address vulnerabilities proactively.

Patching and Updates

Stay informed about software patches and security advisories from Color-String to address known vulnerabilities promptly.