CVE-2024-45394

OTP secret disclosure via weak key derivation

Published Sep 3, 2024 · Updated Oct 9, 2024

Weak key derivation in Authenticator 7.0.0 and earlier allows local users with copied user data to recover its encryption key. The at-rest encryption path derives the AES-256 key with EVP_BytesToKey, a weak password-based KDF that permits efficient offline guessing. Exploitation requires access to encrypted extension data or a protected backup and enables recovery of stored one-time-password secrets after the key is cracked.

CVSS severity8.8
High
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak key derivation in Authenticator 7.0.0 and earlier allows local users with copied user data to recover its encryption key. The at-rest encryption path derives the AES-256 key with EVP_BytesToKey, a weak password-based KDF that permits efficient offline guessing. Exploitation requires access to encrypted extension data or a protected backup and enables recovery of stored one-time-password secrets after the key is cracked.

The record

CVE
CVE-2024-45394
Published
Sep 3, 2024
Updated
Oct 9, 2024
Vendor
Authenticator Extension
Product
Authenticator
Classifications
CWE-261, T1110.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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 <8.0.0
  2. Affected versionversion=< 8.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Authenticator Extension · Authenticatorversion=0 <8.0.0; version=< 8.0.0

Published CVSS scores

8.8GitHubCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-261Weak Encoding for Password
T1110.002Password Cracking

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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