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CVE-2023-35945

Envoy vulnerable to HTTP/2 memory leak in nghttp2 codec

Published: Jul 13, 2023Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-400
NVD MITRE
7.5CVSSHIGH
EPSS Score
1.1%
Top 38.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Envoy 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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-400CWE-459

Affected Products

Альт 8 СПАО «ИВК»
On-premOS
Operating Systems / linux-distro
nghttp2Сообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
EnvoyСообщество свободного программного обеспечения
LibraryLibrary
OSS Libraries / web-framework
ОС АврораООО "Открытая мобильная платформа"
On-prem
Operating Systems / mobile-os
envoyenvoyproxy
On-prem
Cloud & SaaS / api-gateway
ао «ивк»commercialRUOperating Systemsaka ivk
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо "открытая мобильная платформа"commercialRUOperating Systems
envoyproxyoss-projectUSCloud & SaaSaka envoy proxy, envoy
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/envoyproxy/envoy/security/advisories/GHSA-jfxv-29pc-x22r
github.com
https://github.com/nghttp2/nghttp2/blob/e7f59406556c80904b81b593d38508591bb7523a/lib/nghttp2_session.c#L3346
github.com
https://github.com/nghttp2/nghttp2/pull/1930
github.com
and 30 more references View all →

Timeline

Published
Jul 13, 2023
Last Updated
Nov 21, 2024

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