CVE-2023-36325Network attack vector

Hidden-service deanonymization via cross-context message replay

Published Oct 9, 2024 · Updated Nov 4, 2024

Information disclosure in Java I2P before 2.3.0 allows remote attackers to de-anonymize eepsites through replayed I2NP messages. A shared Bloom filter records a messageID received through a client tunnel, then drops the same ID when sent directly to the router, revealing that the router hosts that client. The correlation requires no authentication or user interaction, normally takes several days, and can be disrupted by router restarts or Bloom-filter false positives.

CVSS severity3.7
Low
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Java I2P before 2.3.0 allows remote attackers to de-anonymize eepsites through replayed I2NP messages. A shared Bloom filter records a messageID received through a client tunnel, then drops the same ID when sent directly to the router, revealing that the router hosts that client. The correlation requires no authentication or user interaction, normally takes several days, and can be disrupted by router restarts or Bloom-filter false positives.

The record

CVE
CVE-2023-36325
Published
Oct 9, 2024
Updated
Nov 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-203, T1590.005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.7CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy
T1590.005Gather Victim Network Information: IP Addresses

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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