Vulnerability Monitor

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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

2019-10-09T16:15:14.687

Last Modified

2024-11-21T04:28:14.570

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

10.0

Impact Score

6.9

Weaknesses
  • Type: Primary
    CWE-400
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application envoyproxy envoy 1.0.0 Yes
Application envoyproxy envoy 1.1.0 Yes
Application envoyproxy envoy 1.2.0 Yes
Application envoyproxy envoy 1.3.0 Yes
Application envoyproxy envoy 1.4.0 Yes
Application envoyproxy envoy 1.5.0 Yes
Application envoyproxy envoy 1.6.0 Yes
Application envoyproxy envoy 1.7.0 Yes
Application envoyproxy envoy 1.7.1 Yes
Application envoyproxy envoy 1.8.0 Yes
Application envoyproxy envoy 1.9.0 Yes
Application envoyproxy envoy 1.9.1 Yes
Application envoyproxy envoy 1.10.0 Yes
Application envoyproxy envoy 1.11.0 Yes
Application envoyproxy envoy 1.11.1 Yes
Application envoyproxy envoy 1.11.2 Yes
References