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Observable Discrepancy

CVE-2019-18887

Severity High
Score 8.1/10

Summary

An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. The UriSigner was subject to timing attacks. This is related to symfony/http-kernel. Note that no fixes are provided for Symfony 3.0, 3.1, 3.2, 3.3, 4.0 and 4.1 as they are not maintained anymore.

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

CWE-203 - Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

Advisory Timeline

  • Published