CVE-2022-3215: XSS
First published: Wed Sep 28 2022(Updated: )
NIOHTTP1 and projects using it for generating HTTP responses can be subject to a HTTP Response Injection attack. This occurs when a HTTP/1.1 server accepts user generated input from an incoming request and reflects it into a HTTP/1.1 response header in some form. A malicious user can add newlines to their input (usually in encoded form) and "inject" those newlines into the returned HTTP response. This capability allows users to work around security headers and HTTP/1.1 framing headers by injecting entirely false responses or other new headers. The injected false responses may also be treated as the response to subsequent requests, which can lead to XSS, cache poisoning, and a number of other flaws. This issue was resolved by adding validation to the HTTPHeaders type, ensuring that there's no whitespace incorrectly present in the HTTP headers provided by users. As the existing API surface is non-failable, all invalid characters are replaced by linear whitespace.
Credit: cve@forums.swift.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Apple Swiftnio | <2.29.1 | |
| Apple Swiftnio | >=2.30.0<2.39.1 | |
| Apple Swiftnio | >=2.40.0<2.42.0 |
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Frequently Asked Questions
What is CVE-2022-3215?
CVE-2022-3215 is a vulnerability that affects NIOHTTP1 and projects using it for generating HTTP responses. It allows for HTTP Response Injection attacks.
What is the severity of CVE-2022-3215?
CVE-2022-3215 has a severity level of 7.5, which is considered high.
How does CVE-2022-3215 work?
CVE-2022-3215 occurs when a HTTP/1.1 server accepts user-generated input from an incoming request and reflects it into a HTTP/1.1 response header, allowing for HTTP Response Injection.
Which software is affected by CVE-2022-3215?
CVE-2022-3215 affects Apple Swiftnio versions up to 2.29.1, versions between 2.30.0 and 2.39.1, and versions between 2.40.0 and 2.42.0.
How can I fix CVE-2022-3215?
To fix CVE-2022-3215, it is recommended to update your Apple Swiftnio software to a version higher than 2.42.0.
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