5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
0.0004 Low
EPSS
Percentile
9.0%
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.