MEDIUM 5.9 Microsoft
CVE-2021-40528
The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because during interaction between two cryptographic libraries a certain dangerous combination of the prime defined by the receiver's public key the generator defined by the receiver's public key and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.
Microsoft Security Update 2021-Sep: The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because during interaction between two cryptographic libraries a certain dangerous combination of the prime defined by the receiver's public key the generator defined by the receiver's public key and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.
Affected Products
- cm1 libgcrypt 1.8.7-3 on CBL Mariner 1.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40528
- https://nvd.nist.gov/vuln/detail/CVE-2021-40528
This medium severity vulnerability with a CVSS score of 5.9 was published on 2021-09-14 via Microsoft. Affected: cm1 libgcrypt 1.8.7-3 on CBL Mariner 1.0.
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