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[email protected]CVE-2020-11080

HistoryJun 03, 2020 - 11:15 p.m.

CVE-2020-11080

2020-06-0323:15:11

CWE-400

CWE-707

[email protected]

web.nvd.nist.gov

439

cve

2020

11080

nghttp2

http/2

denial of service

vulnerability

fix

workaround

nvd

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.7 High

AI Score

Confidence

High

0.012 Low

EPSS

Percentile

85.5%

JSON

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.

Affected configurations

Vulners

NVD

Node

nghttp2nghttp2Range<1.41.0

VendorProductVersionCPE
nghttp2nghttp2*cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
nghttp2	nghttp2	*	cpe:2.3:a:nghttp2:nghttp2::::::::

CNA Affected

[
  {
    "vendor": "nghttp2",
    "product": "nghttp2",
    "versions": [
      {
        "version": "< 1.41.0",
        "status": "affected"
      }
    ]
  }
]