{"id":"CVE-2023-6935","aliases":["ALPINE-CVE-2023-6935","DEBIAN-CVE-2023-6935","EUVD-2023-59133","GHSA-r36f-f47x-637q","JLSEC-2026-677","UBUNTU-CVE-2023-6935"],"status":"published","title":"Marvin Attack vulnerability in SP Math All RSA","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:\n\n--enable-all CFLAGS=\"-DWOLFSSL_STATIC_RSA\"\n\nThe 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.\n\nThe 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.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00539,"percentile":0.45846,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-203"],"published":"2024-02-09T22:25:04Z","modified":"2026-11-03T06:32:44Z","fixes":[{"ecosystem":"Alpine:v3.19","package":"wolfssl","fixed_in":["5.6.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"wolfssl","fixed_in":["5.6.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"wolfssl","fixed_in":["5.6.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"wolfssl","fixed_in":["5.6.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"wolfssl","fixed_in":["5.6.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"wolfssl","fixed_in":["5.6.6-r0"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"wolfssl","fixed_in":["5.6.6-1.2"],"sources":["osv"]},{"ecosystem":"Julia","package":"wolfSSL_jll","fixed_in":["5.7.2+0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.19","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.12.2"},{"fixed":"5.6.6-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.12.2"},{"fixed":"5.6.6-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.12.2"},{"fixed":"5.6.6-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.12.2"},{"fixed":"5.6.6-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.12.2"},{"fixed":"5.6.6-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.12.2"},{"fixed":"5.6.6-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.5.4-2","5.5.4-2+deb12u1","5.5.4-2+deb12u2","5.5.4-2+deb12u3","5.5.4-2.1","5.6.4-1","5.6.4-2","5.6.6-1","5.6.6-1.1","5.6.6-1.2","5.6.6-1.3","5.6.6-1.3~exp1","5.7.0-0.1","5.7.0-0.2","5.7.0-0.3","5.7.2-0.1","5.7.2-0.2","5.7.2-0.3","5.7.2-0.4","5.8.2-1","5.8.2-1.1","5.8.2-1.2","5.8.4-1","5.9.0-0.1","5.9.0-0.2","5.9.1-0.1","5.9.2-1","5.9.2-1.1","5.9.2-1.2"]},{"source":"osv","ecosystem":"Debian:13","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.6.6-1.2"}]}]},{"source":"osv","ecosystem":"Julia","package":"wolfSSL_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.7.2+0"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.8+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.10.2+dfsg-2","3.12.0+dfsg-1","3.12.2+dfsg-1","3.13.0+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1.0+dfsg-2","4.2.0+dfsg-1","4.2.0+dfsg-2","4.2.0+dfsg-3","4.3.0+dfsg-2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.6.0-3","5.0.0-1","5.1.1-1","5.2.0-1","5.2.0-2"]}],"products":[{"vendor":"wolfssl","product":"wolfssl"}],"references":[{"url":"https://people.redhat.com/~hkario/marvin/","tags":["technical-description","third-party-advisory","x_transferred","Technical Description","advisory","web"]},{"url":"https://www.wolfssl.com/docs/security-vulnerabilities/","tags":["x_transferred","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6935","tags":["advisory","web"]},{"url":"https://people.redhat.com/~hkario/marvin","tags":["web"]},{"url":"https://www.wolfssl.com/docs/security-vulnerabilities","tags":["web"]},{"url":"https://github.com/advisories/GHSA-r36f-f47x-637q","tags":["web"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2023-6935","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6935.json","tags":["advisory"]},{"url":"https://github.com/wolfSSL/wolfssl","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-6935","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-6935","tags":["report"]},{"url":"https://github.com/wolfSSL/wolfssl/blob/v5.6.6-stable/ChangeLog.md#vulnerabilities","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-6935","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-6935","title":"Marvin Attack vulnerability in SP Math All RSA","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:\n\n--enable-all CFLAGS=\"-DWOLFSSL_STATIC_RSA\"\n\nThe 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.\n\nThe 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.\n","status":"published","published":"2024-02-09T22:25:04.663Z","modified":"2024-08-02T08:42:08.533Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:35:25.095989Z"}],"euvd":[{"id":"EUVD-2023-59133","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:\n\n--enable-all CFLAGS=\"-DWOLFSSL_STATIC_RSA\"\n\nThe 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.\n\nThe 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.\n","status":"published","published":"2024-02-09T22:25:04Z","modified":"2024-08-02T08:42:08Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T03:50:10.17189Z"}],"ghsa":[{"id":"GHSA-r36f-f47x-637q","title":"wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a...","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:\n\n--enable-all CFLAGS=\"-DWOLFSSL_STATIC_RSA\"\n\nThe 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.\n\nThe 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.\n","status":"published","published":"2024-02-10T00:31:59Z","modified":"2024-11-07T21:32:40Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:58:45.881488Z"}],"nvd":[{"id":"CVE-2023-6935","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:\n\n--enable-all CFLAGS=\"-DWOLFSSL_STATIC_RSA\"\n\nThe 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.\n\nThe 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.\n","status":"published","published":"2024-02-09T23:15:08.03Z","modified":"2026-06-17T06:51:43.017Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:09:04.527564Z"}],"osv":[{"id":"ALPINE-CVE-2023-6935","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:\n\n--enable-all CFLAGS=\"-DWOLFSSL_STATIC_RSA\"\n\nThe 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.\n\nThe 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.\n","status":"published","published":"2024-02-09T23:15:08.03Z","modified":"2026-11-03T06:32:44.415518478Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T07:17:02.90744Z"},{"id":"CVE-2023-6935","title":"Marvin Attack vulnerability in SP Math All RSA","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:\n\n--enable-all CFLAGS=\"-DWOLFSSL_STATIC_RSA\"\n\nThe 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.\n\nThe 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.\n","status":"published","published":"2024-02-09T22:25:04.663Z","modified":"2026-10-28T02:30:35.841806825Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T15:44:37.180532Z"},{"id":"DEBIAN-CVE-2023-6935","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.","status":"published","published":"2024-02-09T23:15:08.03Z","modified":"2026-10-26T18:02:47.482411112Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:41.533064Z"},{"id":"JLSEC-2026-677","title":"wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing...","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:\n\n--enable-all CFLAGS=\"-`DWOLFSSL_STATIC_RSA`\"\n\nThe 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.\n\nThe 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.","status":"published","published":"2026-07-14T21:41:35.775Z","modified":"2026-07-25T18:23:59.491012021Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:47:19.003546Z"},{"id":"UBUNTU-CVE-2023-6935","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.","status":"published","published":"2024-02-09T23:15:00Z","modified":"2026-04-22T14:35:39.393552Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T16:54:41.555387Z"}]}}