Improper Verification of Cryptographic Signature in node-forge

Impact

RSA PKCS#1 v1.5 signature verification code does not check for tailing garbage bytes after decoding a DigestInfo ASN.1 structure. This can allow padding bytes to be removed and garbage data added to forge a signature when a low public exponent is being used.

Patches

The issue has been addressed in node-forge 1.3.0.

References

For more information, please see
“Bleichenbacher’s RSA signature forgery based on implementation error”
by Hal Finney.

For more information

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