Skip to main content

Improper Certificate Validation

CVE-2025-4947

Medium
5.4/10

Summary

libcurl versions 8.8.0 through 8.12.1 and curl versions curl-8_8_0 through curl-8_13_0 accidentally skip the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.

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

CWE-295 - Improper Certificate Validation

The authenticity component of a web system stems from the ability to validate “Digital certificates”, which (i) establish trust between two or more entities sharing data over a network; (ii) ensure data at rest and transit is secure from unauthorized access; and (iii) check the identity of the actors that interact with the system. An application with absent or ineffective certificate validation mechanisms allows malicious users, impersonating trusted hosts, to manipulate the communication path between the client and the host, resulting in unauthorized access to data and to the application’s internal environment, and potentially enabling man-in-the-middle attacks.

References

Advisory Timeline

  • Published