CVE-2023-33980Public exploitNetwork attack vector

Repeated application crashes via oversized BSP messages

Published May 24, 2023 · Updated Jan 16, 2025

Denial of service in Briar before 1.4.22 allows remote authenticated users to crash the app repeatedly via oversized BSP messages. The BSP record reader parses a MESSAGE record beyond the 32 KiB message limit, causing MessageFactoryImpl to throw an uncaught IllegalArgumentException that exits the app. The sender must be a direct contact and remain online; repeated malicious records keep the recipient's app unusable without memory corruption or message propagation.

CVSS severity7.5
High
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Briar before 1.4.22 allows remote authenticated users to crash the app repeatedly via oversized BSP messages. The BSP record reader parses a MESSAGE record beyond the 32 KiB message limit, causing MessageFactoryImpl to throw an uncaught IllegalArgumentException that exits the app. The sender must be a direct contact and remain online; repeated malicious records keep the recipient's app unusable without memory corruption or message propagation.

The record

CVE
CVE-2023-33980
Published
May 24, 2023
Updated
Jan 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2025Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

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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