{
  "cveId": "CVE-2023-6935",
  "url": "https://patchblox.com/security/cve/CVE-2023-6935",
  "summary": "CVE-2023-6935 is fixed in wolfssl on 1 platform by DEBIAN-CVE-2023-6935 (version 5.6.6-1.2), released February 9, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "wolfssl: wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher s...",
  "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=\u0022-DWOLFSSL_STATIC_RSA\u0022  The define \u201CWOLFSSL_STATIC_RSA\u201D enables static RSA cipher suites, which is not recommended, and has been disabled by default since wolfSSL 3.6.6.\u00A0 Therefore the default build since 3.6.6, even with \u0022--enable-all\u0022, 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\u2019s private key is not exposed.",
  "published": "2024-02-09T23:15:08Z",
  "severity": "medium",
  "cvss": 5.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss": 0.00539,
  "epssPercentile": 0.45584,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "wolfssl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.6.6-1.2",
      "fix": "DEBIAN-CVE-2023-6935",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-6935",
      "released": "2024-02-09T23:15:08Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}