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="-DWOLFSSLSTATICRSA"
The define “WOLFSSLSTATICRSA” 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.
{
"license": "CC-BY-4.0",
"sources": [
{
"modified": "2026-06-17T06:51:43.017Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-6935",
"imported": "2026-07-17T22:23:35.805Z",
"database_specific": {
"status": "Modified"
},
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2023-6935",
"published": "2024-02-09T23:15:08.030Z",
"id": "CVE-2023-6935"
},
{
"modified": "2024-11-07T21:32:40Z",
"url": "https://api.github.com/advisories/GHSA-r36f-f47x-637q",
"imported": "2026-07-17T22:23:35.971Z",
"html_url": "https://github.com/advisories/GHSA-r36f-f47x-637q",
"id": "GHSA-r36f-f47x-637q",
"published": "2024-02-10T00:31:59Z"
},
{
"modified": "2024-08-02T08:42:08Z",
"url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2023-59133",
"imported": "2026-07-17T22:23:40.336Z",
"html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-59133",
"published": "2024-02-09T22:25:04Z",
"id": "EUVD-2023-59133"
}
]
}