CVE-2024-36279Network attack vector

DM manipulation via missing ciphertext integrity checks

Published Jun 17, 2024 · Updated Aug 2, 2024

Cryptographic integrity failure in FreeFrom K.K. FreeFrom - the nostr client before 1.3.5 allows man-in-the-middle attackers to alter DMs. The app's encrypted-DM handling accepts modified ciphertext without an integrity check, so altered plaintext is displayed as a legitimate message. The attacker must control the communication path; the documented consequence is message-content modification, not disclosure or service interruption.

CVSS severity5.3
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic integrity failure in FreeFrom K.K. FreeFrom - the nostr client before 1.3.5 allows man-in-the-middle attackers to alter DMs. The app's encrypted-DM handling accepts modified ciphertext without an integrity check, so altered plaintext is displayed as a legitimate message. The attacker must control the communication path; the documented consequence is message-content modification, not disclosure or service interruption.

The record

CVE
CVE-2024-36279
Published
Jun 17, 2024
Updated
Aug 2, 2024
Vendor
FreeFrom K.K.
Product
FreeFrom - the nostr client
Classifications
CWE-649, T1638
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.3.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeFrom K.K. · FreeFrom - the nostr clientversion=0 <1.3.5
FreeFrom K.K. · FreeFrom - the nostr client Appversion=prior to 1.3.5

Published CVSS scores

5.3JPCERT/CC and IPACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-649Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking
T1638Adversary-in-the-Middle

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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