Improper Handling of Case Sensitivity Affecting envoyproxy/envoy package, versions [,1.23.12)[1.24.0,1.24.10)[1.25.0,1.25.9)[1.26.0,1.26.4)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.06% (27th percentile)

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  • Snyk IDSNYK-UNMANAGED-ENVOYPROXYENVOY-5808313
  • published27 Jul 2023
  • disclosed25 Jul 2023
  • creditUnknown

Introduced: 25 Jul 2023

CVE-2023-35944  (opens in a new tab)
CWE-178  (opens in a new tab)

How to fix?

Upgrade envoyproxy/envoy to version 1.23.12, 1.24.10, 1.25.9, 1.26.4 or higher.

Overview

Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity. Envoy allows mixed-case schemes in HTTP/2. However, some internal scheme checks are case-sensitive, this can lead to the rejection of requests with mixed-case schemes such as htTp or htTps, or the bypassing of some requests such as https in unencrypted connections.

CVSS Scores

version 3.1