CVE-2024-6863

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

Published Mar 20, 2025 CVSS 3.0 · 6.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-6964 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.
Github GHSA Github GHSA GHSA-m37h-8r48-2cxj H2O Vulnerable to Execution of Arbitrary Files
History
Type Values Removed Values Added
First Time appeared H2o
H2o h2o
CPEs cpe:2.3:a:h2o:h2o:3.46.0:*:*:*:*:*:*:*
Vendors & Products H2o
H2o h2o
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Encryption of Arbitrary Files with Attacker-Controlled Key in h2oai/h2o-3
Weaknesses CWE-749
References
Metrics cvssV3_0

{'score': 6.5, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
@huntr_ai
Published
Updated
Oct 15, 2025, 12:50 PM
Reserved
Jul 17, 2024, 8:44 PM
Status
Analyzed
Published
Mar 20, 2025, 10:15 AM
Modified
Jun 17, 2026, 8:18 AM