CVE-2022-1642 : Vulnerability Insights and Analysis
Learn about CVE-2022-1642, a Swift Corelib-Foundation vulnerability allowing denial of service attacks through JSON decoding type mismatch. Find mitigation steps and affected versions here.
A detailed analysis of CVE-2022-1642, a vulnerability in Swift Corelib-Foundation that could lead to a denial of service attack.
Understanding CVE-2022-1642
This CVE pertains to a vulnerability in Swift Corelib-Foundation that can be exploited to launch a denial of service attack due to a type mismatch in JSON decoding.
What is CVE-2022-1642?
The vulnerability arises from a mismatch between deserialization mechanisms in Swift standard library and JSONDecoder class, allowing specially crafted JSON documents to crash Swift-based web frameworks.
The Impact of CVE-2022-1642
While the attack does not pose immediate confidentiality risks, it can lead to unexpected crashes and escalation of risks by triggering error conditions, potentially causing denial of service.
Technical Details of CVE-2022-1642
This section covers the vulnerability description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability is rooted in type coercion during JSON document deserialization, leading to a crash when decoding integers from floating-point JSON values.
Affected Systems and Versions
Swift Corelib-Foundation versions 5.5.0 to 5.6.1 are affected by this vulnerability.
Exploitation Mechanism
By sending a specially crafted JSON document to Swift-based web frameworks, attackers can induce crashes, potentially resulting in denial of service.
Mitigation and Prevention
Learn about the immediate steps to take, long-term security practices, and the importance of patching and updates.
Immediate Steps to Take
Service owners should upgrade to Swift 5.6.2 for Linux and Windows, ensuring the invocation of consistent methods during JSON decoding.
Long-Term Security Practices
Regularly update the Swift toolchain, recompile, and redeploy software to mitigate future vulnerabilities.
Patching and Updates
Swift 5.6.2 for Linux and Windows contains the fix for this vulnerability, preventing type mismatches in JSON decoding. Darwin-based operating systems are not impacted by this issue.