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CVE-2024-6863

Encryption of Arbitrary Files with Attacker-Controlled Key in h2oai/h2o-3

Published: Mar 20, 2025Updated: Jul 15, 2025 Sources: CVE List NVD GHSACWE-749
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.3%
Top 75.5%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
No Fix Available

Description

In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacker to encrypt arbitrary files with keys of their choice, making it exceedingly difficult for the target to recover the keys needed for decryption.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:L
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:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-749

Affected Products

h2oh2o
On-prem
Networking Infrastructure / load-balancer-proxy
h2oai/h2o-3h2oai
Mixed
AI / ML / ml-framework
h2oPyPIOSS Libraries
ai.h2o:h2o-coreMavenOSS Libraries
h2ooss-projectNetworking Infrastructureaka h2o web server, h2o, picotls, quicly
h2oaicommercialAI / ML
pypipackage-ecosystemOSS Libraries
mavenpackage-ecosystemOSS Libraries

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

References

https://huntr.com/bounties/10f55937-0cba-4530-897f-2abf30ed5270
huntr.com
https://nvd.nist.gov/vuln/detail/CVE-2024-6863
nvd.nist.gov
https://github.com/h2oai/h2o-3
github.com
and 1 more references View all →

Timeline

Published
Mar 20, 2025
Last Updated
Jul 15, 2025

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