CVE-2021-23624 : Exploit Details and Defense Strategies
Learn about CVE-2021-23624, a Prototype Pollution vulnerability in the 'dotty' package before 0.1.2. Explore its impact, technical details, and mitigation steps to secure your systems.
This CVE, known as Prototype Pollution, affects the 'dotty' package before version 0.1.2. It allows a type confusion vulnerability that can bypass CVE-2021-25912 when user-provided keys are used as arrays.
Understanding CVE-2021-23624
This section provides an overview of the CVE-2021-23624 vulnerability.
What is CVE-2021-23624?
CVE-2021-23624, also called Prototype Pollution, impacts the 'dotty' package versions earlier than 0.1.2. It arises from a type confusion flaw that enables bypassing CVE-2021-25912 when keys provided by users are in array format.
The Impact of CVE-2021-23624
The vulnerability poses a medium severity risk with a CVSS base score of 5.6. It has a low impact on confidentiality, integrity, and availability of affected systems. The exploit code maturity is at the proof-of-concept stage.
Technical Details of CVE-2021-23624
In this section, we delve into the technical aspects of CVE-2021-23624.
Vulnerability Description
CVE-2021-23624 is categorized as Prototype Pollution, leading to a type confusion vulnerability in the 'dotty' package before version 0.1.2. The issue can be exploited by utilizing user-provided keys as arrays.
Affected Systems and Versions
The vulnerability impacts 'dotty' package versions that are earlier than 0.1.2. Systems using these versions are susceptible to the Prototype Pollution issue.
Exploitation Mechanism
Exploiting CVE-2021-23624 involves manipulating user-provided keys in array form, which triggers the type confusion vulnerability and allows bypassing CVE-2021-25912.
Mitigation and Prevention
This section highlights the measures to mitigate and prevent the CVE-2021-23624 vulnerability.
Immediate Steps to Take
Users are recommended to update the 'dotty' package to version 0.1.2 or later to mitigate the risk posed by CVE-2021-23624. Additionally, limiting the use of user-provided keys as arrays can help prevent exploitation.
Long-Term Security Practices
Implementing secure coding practices, staying updated on security alerts, and conducting regular security audits can enhance long-term security posture against similar vulnerabilities.
Patching and Updates
Vendor-supplied patches addressing the Prototype Pollution issue in the 'dotty' package should be promptly applied to eliminate the vulnerability.