CVE-2024-27919

2024-04-0415:15:38

CWE-390

[email protected]

web.nvd.nist.gov

envoy

http/2

vulnerability

fixed

version 1.29.2

denial of service

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

7.4 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

Envoy is a cloud-native, open-source edge and service proxy. In versions 1.29.0 and 1.29.1, theEnvoy HTTP/2 protocol stack is vulnerable to the flood of CONTINUATION frames. Envoy’s HTTP/2 codec does not reset a request when header map limits have been exceeded. This allows an attacker to send an sequence of CONTINUATION frames without the END_HEADERS bit set causing unlimited memory consumption. This can lead to denial of service through memory exhaustion. Users should upgrade to versions 1.29.2 to mitigate the effects of the CONTINUATION flood. Note that this vulnerability is a regression in Envoy version 1.29.0 and 1.29.1 only. As a workaround, downgrade to version 1.28.1 or earlier or disable HTTP/2 protocol for downstream connections.

Affected configurations

Vulners

Node

envoyproxyenvoyRange1.29.0–1.29.2

VendorProductVersionCPE
envoyproxyenvoy*cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
envoyproxy	envoy	*	cpe:2.3:a:envoyproxy:envoy::::::::

CNA Affected

[
  {
    "vendor": "envoyproxy",
    "product": "envoy",
    "versions": [
      {
        "version": ">= 1.29.0, < 1.29.2",
        "status": "affected"
      }
    ]
  }
]