Vulnerability Database

296,138

Total vulnerabilities in the database

CVE-2019-15226

Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack.

  • Published: Oct 9, 2019
  • Updated: Apr 13, 2023
  • CVE: CVE-2019-15226
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: High
  • Score: 7.8
  • AV:N/AC:L/Au:N/C:N/I:N/A:C

CWEs:

Software From Fixed in
envoyproxy / envoy 1.0.0 1.0.0.x
envoyproxy / envoy 1.1.0 1.1.0.x
envoyproxy / envoy 1.2.0 1.2.0.x
envoyproxy / envoy 1.3.0 1.3.0.x
envoyproxy / envoy 1.4.0 1.4.0.x
envoyproxy / envoy 1.5.0 1.5.0.x
envoyproxy / envoy 1.6.0 1.6.0.x
envoyproxy / envoy 1.7.0 1.7.0.x
envoyproxy / envoy 1.7.1 1.7.1.x
envoyproxy / envoy 1.8.0 1.8.0.x
envoyproxy / envoy 1.9.0 1.9.0.x
envoyproxy / envoy 1.9.1 1.9.1.x
envoyproxy / envoy 1.10.0 1.10.0.x
envoyproxy / envoy 1.11.0 1.11.0.x
envoyproxy / envoy 1.11.1 1.11.1.x
envoyproxy / envoy 1.11.2 1.11.2.x