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Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CVE-2025-22871

High
9.1/10

Summary

The `net/http` package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a `net/http` server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext. This issue affects spiral/roadrunner versions prior to 2025.1.0.

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

CWE-444 - HTTP Request Smuggling

Entities such as web servers, web caching proxies, and application firewalls could parse HTTP requests differently. When there are two or more such entities in the path of an HTTP request, an attacker can send a specially crafted HTTP request that is seen as two different sets of requests by the attacked devices, allowing the attacker to smuggle a request into one device without the other device being aware of it. Such a vulnerability can prove devastating, for it enables further attacks on the application, like web cache poisoning, session hijacking, cross-site scripting, security bypassing, and sensitive information exposure.

References

Advisory Timeline

  • Published