CVE-2024-23342 in python-ecdsa (Minerva)
Summary
by MITRE • 01/23/2024
The `ecdsa` PyPI package is a pure Python implementation of ECC (Elliptic Curve Cryptography) with support for ECDSA (Elliptic Curve Digital Signature Algorithm), EdDSA (Edwards-curve Digital Signature Algorithm) and ECDH (Elliptic Curve Diffie-Hellman). Versions 0.18.0 and prior are vulnerable to the Minerva attack. As of time of publication, no known patched version exists.
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Analysis
by VulDB Data Team • 08/27/2025
The CVE-2024-23342 vulnerability affects the ecdsa PyPI package, a widely-used pure Python implementation of elliptic curve cryptography that supports multiple cryptographic algorithms including ECDSA, EdDSA, and ECDH. This particular vulnerability stems from the package's susceptibility to the Minerva attack, a sophisticated side-channel attack that targets cryptographic implementations by exploiting timing variations in computational operations. The vulnerability impacts all versions 0.18.0 and earlier, leaving users exposed to potential cryptographic compromise without any available patched version at the time of publication.
The technical flaw in the ecdsa package lies in its implementation of elliptic curve operations that fail to properly mitigate timing side channels inherent in the Minerva attack framework. This attack specifically targets the scalar multiplication operations used in elliptic curve cryptography, where the time taken to perform these mathematical operations can leak information about the secret key through subtle variations in execution time. The vulnerability manifests when the cryptographic operations are executed in a manner that does not sufficiently randomize or obscure the timing characteristics of the underlying computations, allowing attackers to potentially reconstruct private keys through statistical analysis of timing measurements.
The operational impact of this vulnerability is severe for any system relying on the affected ecdsa package for cryptographic security. Organizations using this package for digital signatures, key exchange, or other elliptic curve based security mechanisms face potential exposure of their private keys, which could lead to complete compromise of their cryptographic infrastructure. The attack's effectiveness increases when attackers can observe multiple signature operations over time, making the vulnerability particularly dangerous in environments where the package is used extensively or in high-traffic applications. The lack of available patched versions at the time of publication creates an urgent security risk for all users of affected systems.
Mitigation strategies for this vulnerability require immediate action from affected organizations, as no patched version exists at the time of analysis. The primary recommendation involves either upgrading to a newer version of the ecdsa package once a patched release becomes available, or implementing additional countermeasures such as constant-time implementation techniques, randomizing execution timing, or using hardware security modules that provide better protection against side-channel attacks. Organizations should also consider alternative cryptographic libraries that have been proven resistant to such attacks, and implement monitoring systems to detect potential exploitation attempts. This vulnerability aligns with CWE-388, which addresses the use of error handling mechanisms that may leak information, and maps to ATT&CK technique T1552.001, which covers the exploitation of cryptographic systems through side-channel attacks. The absence of a patched version underscores the importance of maintaining awareness of cryptographic vulnerabilities and the need for robust security practices in cryptographic implementation.