Signature malleability via unchecked scalar ranges
Published Sep 28, 2023 · Updated Sep 23, 2024
Signature malleability in Consensys gnark-crypto through 0.11.2 allows remote attackers to submit crafted EdDSA or ECDSA signatures. Signature deserialization accepts scalar values outside the required [1,n-1] interval, so equivalent signatures and zero values can pass into verification; zero values can also trigger a null-pointer denial of service. Exploitation requires an application to process attacker-controlled serialized signatures, and the observed impact is signature uniqueness failure or service interruption rather than direct data disclosure.
Summary
What happened
Signature malleability in Consensys gnark-crypto through 0.11.2 allows remote attackers to submit crafted EdDSA or ECDSA signatures. Signature deserialization accepts scalar values outside the required [1,n-1] interval, so equivalent signatures and zero values can pass into verification; zero values can also trigger a null-pointer denial of service. Exploitation requires an application to process attacker-controlled serialized signatures, and the observed impact is signature uniqueness failure or service interruption rather than direct data disclosure.
The record
- CVE
- CVE-2023-44273
- Published
- Sep 28, 2023
- Updated
- Sep 23, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-347
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 28, 2023CVE publishedPublication date reported by the CVE source.
- Sep 23, 2024Record updatedLatest update available in the CVE record.
Exploitability
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Attacks
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