Elliptic's private key extraction in ECDSA upon signing a malformed input (e.g. a string)

Description

Private key can be extracted from ECDSA signature upon signing a malformed input (e.g. a string or a number), which could e.g. come from JSON network input

Note that elliptic by design accepts hex strings as one of the possible input types

Recommendation

Update the elliptic package to the latest compatible version. Followings are version details:

• Affected version(s): <= 6.6.0
• Patched version(s): 6.6.1

References

• GHSA-vjh7-7g9h-fjfh
• CWE-200
• OWASP 2021-A1