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WS-2023-0284
Date: August 19, 2025
Blst versions v0.3.0 through 0.3.10 failed to perform a signature group-check if the call to SigValidate in the Go bindings was complemented with a check for infinity. Formally speaking, infinity, or the identity element of the elliptic curve group, is a member of the group, and the group-check should allow it. An initial review of blst users on GitHub did not uncover any use of this function with the complementary infinity check. This optional check was added as a convenience feature because despite infinity being a legitimate member of the group, individual signatures should never be infinite (as it is equivalent to having zero for the secret key), and observing one should raise a flag.
Language: Go
Severity Score
Related Resources (5)
Severity Score
Weakness Type (CWE)
Improper Validation of Integrity Check Value
CWE-354CVSS v3.1
Base Score: |
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Attack Vector (AV): | NETWORK |
Attack Complexity (AC): | LOW |
Privileges Required (PR): | NONE |
User Interaction (UI): | NONE |
Scope (S): | UNCHANGED |
Confidentiality (C): | HIGH |
Integrity (I): | NONE |
Availability (A): | NONE |