Signature verification bypass via spoofed Buffer objects
Published Jul 1, 2025 · Updated Jul 1, 2025
Improper cryptographic signature verification in BitcoinJS tiny-secp256k1 before 1.1.7 allows remote attackers to authenticate crafted messages. The verify() path relies on the npm buffer package's spoofable Buffer.isBuffer check, so JSON-compatible objects pass as messages and yield false-positive true results. Exploitation requires a browser-bundled or React Native environment using that Buffer implementation plus a known valid message-signature pair; the result is acceptance of attacker-chosen message content.
Summary
What happened
Improper cryptographic signature verification in BitcoinJS tiny-secp256k1 before 1.1.7 allows remote attackers to authenticate crafted messages. The verify() path relies on the npm buffer package's spoofable Buffer.isBuffer check, so JSON-compatible objects pass as messages and yield false-positive true results. Exploitation requires a browser-bundled or React Native environment using that Buffer implementation plus a known valid message-signature pair; the result is acceptance of attacker-chosen message content.
The record
- CVE
- CVE-2024-49365
- Published
- Jul 1, 2025
- Updated
- Jul 1, 2025
- Vendor
- BitcoinJS
- Product
- tiny-secp256k1
- Classifications
- CWE-347
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 1, 2025CVE publishedPublication date reported by the CVE source.
- Jul 1, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 1.1.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Bundled-environment verify() bypass proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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