Envoy vulnerable to HTTP/2 memory leak in nghttp2 codec

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Summary

CVECVE-2023-35945
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-07-13 21:15:08 UTC
Updated2026-10-15 00:16:33 UTC
DescriptionEnvoy is a cloud-native high-performance edge/middle/service proxy. Envoy’s HTTP/2 codec may leak a header map and bookkeeping structures upon receiving `RST_STREAM` immediately followed by the `GOAWAY` frames from an upstream server. In nghttp2, cleanup of pending requests due to receipt of the `GOAWAY` frame skips de-allocation of the bookkeeping structure and pending compressed header. The error return [code path] is taken if connection is already marked for not sending more requests due to `GOAWAY` frame. The clean-up code is right after the return statement, causing memory leak. Denial of service through memory exhaustion. This vulnerability was patched in versions(s) 1.26.3, 1.25.8, 1.24.9, 1.23.11.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: CWE-400 | CWE-459 | CWE-400 CWE-400: Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Envoyproxy Envoy All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Envoyproxy Envoy affected >= 1.26.0, < 1.26.3 Not specified
CNA Envoyproxy Envoy affected >= 1.25.0, < 1.25.8 Not specified
CNA Envoyproxy Envoy affected >= 1.24.0, < 1.24.9 Not specified
CNA Envoyproxy Envoy affected >= 1.23.0, < 1.23.11 Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
github.com/nghttp2/nghttp2/blob/e7f59406556c80904b81b593d38508591bb7523a... af854a3a-2127-422b-91ae-364da2661108 github.com Product
HTTP/2 memory leak in nghttp2 codec · Advisory · envoyproxy/envoy · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Vendor Advisory
cert-portal.siemens.com/productcert/html/ssa-943925.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 355759 Amazon Linux Security Advisory for nghttp2 : ALAS-2023-1793
  • 355779 Amazon Linux Security Advisory for nghttp2 : ALAS2-2023-2180
  • 355802 Amazon Linux Security Advisory for nodejs : ALAS2023-2023-290
  • 355811 Amazon Linux Security Advisory for nghttp2 : ALAS2023-2023-278
  • 355870 Amazon Linux Security Advisory for ecs-service-connect-agent : ALAS2023-2023-300
  • 503044 Alpine Linux Security Update for nghttp2
  • 503048 Alpine Linux Security Update for nghttp2
  • 503051 Alpine Linux Security Update for nghttp2
  • 673636 EulerOS Security Update for nghttp2 (EulerOS-SA-2023-3346)
  • 673794 EulerOS Security Update for nghttp2 (EulerOS-SA-2023-3224)
  • 673870 EulerOS Security Update for nghttp2 (EulerOS-SA-2023-3038)
  • 673906 EulerOS Security Update for nghttp2 (EulerOS-SA-2023-3189)
  • 673934 EulerOS Security Update for nghttp2 (EulerOS-SA-2023-3015)
  • 674095 EulerOS Security Update for nghttp2 (EulerOS-SA-2023-3314)
  • 754949 SUSE Enterprise Linux Security Update for nghttp2 (SUSE-SU-2023:3842-1)
  • 755049 SUSE Enterprise Linux Security Update for nghttp2 (SUSE-SU-2023:3997-1)
  • 755101 SUSE Enterprise Linux Security Update for nghttp2 (SUSE-SU-2023:4102-1)
  • 907095 Common Base Linux Mariner (CBL-Mariner) Security Update for nghttp2 (27682-1)
  • 907279 Common Base Linux Mariner (CBL-Mariner) Security Update for cmake (27667-1)
  • 907304 Common Base Linux Mariner (CBL-Mariner) Security Update for nodejs18 (27683-1)
  • 907330 Common Base Linux Mariner (CBL-Mariner) Security Update for nodejs (27650-1)

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