CWE-354

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          "type": "remediation reviewer",
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              "value": "Insufficient Verification of Data Authenticity vulnerability in hexpm hex (\u003ctt\u003eHex.RemoteConverger\u003c/tt\u003e module) allows dependency integrity bypass via unverified lockfile checksums.\u003cp\u003eHex stores checksums for dependencies in the \u003ctt\u003emix.lock\u003c/tt\u003e file to ensure reproducible and integrity-checked builds. However, \u003ctt\u003eHex.RemoteConverger.verify_resolved/2\u003c/tt\u003e never executes checksum verification because the lock data returned by \u003ctt\u003eHex.Utils.lock/1\u003c/tt\u003e uses string-based dependency names, while the verification logic compares against atom-based names. This type mismatch causes the verification code path to be silently skipped. Checksums are still validated when packages are initially downloaded from the registry, but mismatches between the lockfile and resolved dependencies are not detected.\u003c/p\u003e\u003cp\u003eAn attacker who can influence cached packages (e.g., via local cache poisoning or a compromised registry) can provide modified dependency contents that will be accepted without detection. The \u003ctt\u003emix.lock\u003c/tt\u003e file is silently rewritten with the checksum values from the registry, erasing evidence of tampering.\u003c/p\u003e\u003cp\u003eThis issue affects hex: from 0.16.0 before 2.4.2.\u003c/p\u003e"
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              "value": "Issue Summary: Cryptographic Message Services (CMS) processing fails to perform\u003cbr\u003esufficient input validation on the cipher and tag length fields of\u003cbr\u003eAuthEnvelopedData containers, leading to various potential compromises.\u003cbr\u003e\u003cbr\u003eImpact Summary: Attackers making use of these vulnerabilities may achieve\u003cbr\u003ekey-equivalent functionality for a given CMS recipient and/or bypass integrity\u003cbr\u003evalidation for a given message.\u003cbr\u003e\u003cbr\u003eIn one use case, an attacker may send a CMS message containing\u003cbr\u003eAuthEnvelopedData with the cipher specified as a non-AEAD cipher.  OpenSSL\u003cbr\u003eerroneously allows this selection, and attempts to decrypt and validate the\u003cbr\u003emessage.\u003cbr\u003e\u003cbr\u003eAn on-path attacker who captures one legitimate AES-GCM AuthEnvelopedData\u003cbr\u003eaddressed to the victim can re-emit it with the recipientInfos set left\u003cbr\u003ebyte-for-byte intact, so the victim\u0027s private key still unwraps the genuine CEK\u003cbr\u003e(the content-encryption key), but with the inner OID rewritten to AES-256-OFB\u003cbr\u003e(Output Feedback Mode, an unauthenticated keystream mode) and with an\u003cbr\u003eattacker-chosen IV and ciphertext. The victim initializes AES-256-OFB under the\u003cbr\u003ereal CEK, never consults the MAC field, and CMS_decrypt() returns success.\u003cbr\u003e\u003cbr\u003eIf the application under attack responds to the attacker with any indicator\u003cbr\u003eshowing success or failure of the decryption effort, it is possible for the\u003cbr\u003eattacker to use this as an oracle to obtain key equivalent functionality for the\u003cbr\u003eCEK used for the chosen recipient of the message.\u003cbr\u003e\u003cbr\u003eIn another use case, an attacker can reduce the tag length of the chosen AEAD\u003cbr\u003ecipher for a given AuthEnvelopedData container to be a single byte long,\u003cbr\u003eallowing an attacker to brute force CMS decryption, producing an integrity\u003cbr\u003ebypass for applications that trust CMS_decrypt() to reject modified content.\u003cbr\u003e\u003cbr\u003eThe FIPS modules are not affected by this issue."
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