CVE-2021-32666 Explained : Impact and Mitigation
Learn about CVE-2021-32666, affecting wire-ios <= 3.8.0. Discover the impact, technical details, and mitigation steps for the wireapp asset DoS vulnerability.
This article provides an overview of CVE-2021-32666, a vulnerability in wire-ios versions <= 3.8.0 that can lead to denial of service between users.
Understanding CVE-2021-32666
CVE-2021-32666 is a vulnerability in wire-ios versions <= 3.8.0 that allows for a denial of service attack due to improper input validation.
What is CVE-2021-32666?
wire-ios, the iOS version of Wire, has a vulnerability in versions 3.8.0 and earlier, where an invalid assetID containing the " character in a user's profile picture can crash the iOS client, impacting the availability of the service.
The Impact of CVE-2021-32666
The vulnerability can result in a denial of service (DoS) between users of the messaging app wire-ios, potentially disrupting communication and service availability.
Technical Details of CVE-2021-32666
The technical details of CVE-2021-32666 include the vulnerability description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability arises from improper input validation in wire-ios versions 3.8.0 and prior, allowing users with an invalid assetID containing the " character to crash the iOS client.
Affected Systems and Versions
Affected systems include wire-ios versions 3.8.0 and earlier.
Exploitation Mechanism
The vulnerability can be exploited by users with an assetID containing an invalid " character in their profile picture, triggering a crash in the iOS client.
Mitigation and Prevention
To address CVE-2021-32666, immediate steps should be taken, followed by long-term security practices and patching procedures.
Immediate Steps to Take
Users are advised to update wire-ios to version 3.8.1 or later to mitigate the vulnerability and prevent service disruption.
Long-Term Security Practices
Implement robust input validation mechanisms in wire-ios to prevent similar vulnerabilities in the future.
Patching and Updates
Regularly apply security patches and updates provided by wireapp to stay protected against known vulnerabilities.