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

CVE-2023-25950

High
7.3/10

Summary

HTTP request/response smuggling vulnerability in HAProxy versions 2.7-dev1 prior to 2.8-dev1 allows a remote attacker to alter a legitimate user's request. As a result, the attacker may obtain sensitive information or cause a Denial of Service (DoS) condition.

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

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