Vulnerability Monitor

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CVE-2020-11080

In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.

Published

2020-06-03T23:15:11.073

Last Modified

2024-11-21T04:56:44.657

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 3.7 (LOW)

CVSSv2 Vector

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

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

10.0

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-707
  • Type: Primary
    CWE-400
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application nghttp2 nghttp2 < 1.41.0 Yes
Operating System debian debian_linux 9.0 Yes
Operating System debian debian_linux 10.0 Yes
Operating System opensuse leap 15.1 Yes
Operating System fedoraproject fedora 31 Yes
Operating System fedoraproject fedora 33 Yes
Application oracle banking_extensibility_workbench 14.3.0 Yes
Application oracle banking_extensibility_workbench 14.4.0 Yes
Application oracle blockchain_platform < 21.1.2 Yes
Application oracle enterprise_communications_broker 3.1.0 Yes
Application oracle enterprise_communications_broker 3.2.0 Yes
Application oracle graalvm 19.3.2 Yes
Application oracle graalvm 20.1.0 Yes
Application oracle mysql ≤ 7.3.30 Yes
Application oracle mysql ≤ 7.4.29 Yes
Application oracle mysql ≤ 7.5.19 Yes
Application oracle mysql ≤ 7.6.15 Yes
Application oracle mysql ≤ 8.0.21 Yes
Application nodejs node.js ≤ 10.12.0 Yes
Application nodejs node.js < 10.21.0 Yes
Application nodejs node.js ≤ 12.12.0 Yes
Application nodejs node.js < 12.18.0 Yes
Application nodejs node.js ≤ 14.4.0 Yes
References