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Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') in io.netty:netty-codec

CVE-2022-41915

  • io.netty:netty-codec
  • io.netty:netty5-codec
Medium
6.5/10

Summary

Netty project is an event-driven asynchronous network application framework. In affected versions, when calling `DefaultHttpHeadesr.set` with an `_iterator_` of values, header value validation was not performed, allowing malicious header values in the iterator to perform HTTP Response Splitting. Integrators can work around the issue by changing the `DefaultHttpHeaders.set(CharSequence, Iterator<?>)` call, into a `remove()` call, and call `add()` in a loop over the iterator of values. This issue affects io.netty:netty-codec versions 4.1.83.Final through 4.1.85.Final and io.netty:netty5-codec version 5.0.0.Alpha5.

  • LOW
  • NETWORK
  • LOW
  • UNCHANGED
  • NONE
  • NONE
  • LOW
  • NONE

CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

The software receives data from an HTTP agent/component (e.g., web server, proxy, browser, etc.), but it does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers.

References

Advisory Timeline

  • Published