Description (CNA)
A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values. Node.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision. This vulnerability affects **20.x, 22.x, 24.x, and 25.x**.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| nodejs / node | affected 20.20.1 through 20.20.1; affected 22.22.1 through 22.22.1; affected 24.14.0 through 24.14.0; affected 25.8.1 through 25.8.1; affected 4.0 before 4.*; affected 5.0 before 5.*; affected 6.0 before 6.*; affected 7.0 before 7.*; affected 8.0 before 8.*; affected 9.0 before 9.*; affected 10.0 before 10.*; affected 11.0 before 11.*; affected 12.0 before 12.*; affected 13.0 before 13.*; affected 14.0 before 14.*; affected 15.0 before 15.*; affected 16.0 before 16.*; affected 17.0 before 17.*; affected 18.0 before 18.*; affected 19.0 before 19.* |
CWE
No CWE identifiers supplied.
References
ADP enrichment
No English description supplied.
No references supplied.