5 results · Feed
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High —
AWS-LC X.509 Name Constraints Bypass via Wildcard/Unicode CN
### Summary AWS-LC is an open-source, general-purpose cryptographic library. ### Impact A logic error in CN (Common Name) validation allows certificates with wildcard or raw UTF-8 Unicode CN values to bypass name constraints enforcement. The `cn2dnsid` functi…
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High 7.4
CRL Distribution Point Scope Check Logic Error in AWS-LC
A logic error in CRL distribution point validation in AWS-LC before 1.71.0 causes partitioned CRLs to be incorrectly rejected as out of scope, which allows a revoked certificate to bypass certificate revocation checks. To remediate this issue, users should up…
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High 7.5
PKCS7_verify Signature Validation Bypass in AWS-LC
Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes. Customers of AWS services do not need to take action. Applications using AWS…
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Medium 5.9
Timing Side-Channel in AES-CCM Tag Verification in AWS-LC
Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis. The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_cc…
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High 7.5
PKCS7_verify Certificate Chain Validation Bypass in AWS-LC
Improper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer. Customers of AWS services do not need to take act…