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Vulnerability CVE-2023-6935
Published: 2024-02-09 Modified: 2024-02-10
| Description: |
wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher style attack, when built with the following options to configure:
--enable-all CFLAGS="-DWOLFSSL_STATIC_RSA"
The define ??WOLFSSL_STATIC_RSA? enables static RSA cipher suites, which is not recommended, and has been disabled by default since wolfSSL 3.6.6. Therefore the default build since 3.6.6, even with "--enable-all", is not vulnerable to the Marvin Attack. The vulnerability is specific to static RSA cipher suites, and expected to be padding-independent.
The vulnerability allows an attacker to decrypt ciphertexts and forge signatures after probing with a large number of test observations. However the server??s private key is not exposed.
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References: |
https://people.redhat.com/~hkario/marvin/
https://www.wolfssl.com/docs/security-vulnerabilities/
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