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.
[
{
"defaultStatus": "unaffected",
"modules": [
"RSA"
],
"product": "wolfSSL",
"repo": "https://github.com/wolfSSL/wolfssl",
"vendor": "wolfSSL",
"versions": [
{
"lessThanOrEqual": "5.6.4",
"status": "affected",
"version": "3.12.2",
"versionType": "release bundle"
}
]
}
]