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CVE-2023-30847

H2O vulnerable to read from uninitialized pointer in the reverse proxy handler

Published: Apr 27, 2023Updated: Nov 21, 2024 Sources: CVE List NVDCWE-824
NVD MITRE
8.2CVSSHIGH
EPSS Score
0.9%
Top 45.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

H2O is an HTTP server. In versions 2.3.0-beta2 and prior, when the reverse proxy handler tries to processes a certain type of invalid HTTP request, it tries to build an upstream URL by reading from uninitialized pointer. This behavior can lead to crashes or leak of information to back end HTTP servers. Pull request number 3229 fixes the issue. The pull request has been merged to the `master` branch in commit f010336. Users should upgrade to commit f010336 or later.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI: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:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-824

Affected Products

h2oh2o
On-prem
Networking Infrastructure / load-balancer-proxy
h2odena
SaaS
Cloud & SaaS
h2ooss-projectNetworking Infrastructureaka h2o web server, h2o, picotls, quicly
denacommercialCloud & SaaSaka dena inc

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvx
github.com
https://github.com/h2o/h2o/pull/3229
github.com
https://github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33
github.com

Timeline

Published
Apr 27, 2023
Last Updated
Nov 21, 2024

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