fkie_cve-2025-9231
Vulnerability from fkie_nvd
Published
2025-09-30 14:15
Modified
2025-09-30 20:15
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Summary
Issue summary: A timing side-channel which could potentially allow remote recovery of the private key exists in the SM2 algorithm implementation on 64 bit ARM platforms. Impact summary: A timing side-channel in SM2 signature computations on 64 bit ARM platforms could allow recovering the private key by an attacker.. While remote key recovery over a network was not attempted by the reporter, timing measurements revealed a timing signal which may allow such an attack. OpenSSL does not directly support certificates with SM2 keys in TLS, and so this CVE is not relevant in most TLS contexts. However, given that it is possible to add support for such certificates via a custom provider, coupled with the fact that in such a custom provider context the private key may be recoverable via remote timing measurements, we consider this to be a Moderate severity issue. The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as SM2 is not an approved algorithm.
References
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/567f64386e43683888212226824b6a179885a0fe
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/cba616c26ac8e7b37de5e77762e505ba5ca51698
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/eed5adc9f969d77c94f213767acbb41ff923b6f4
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/fc47a2ec078912b3e914fab5734535e76c4820c2
openssl-security@openssl.orghttps://openssl-library.org/news/secadv/20250930.txt
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Issue summary: A timing side-channel which could potentially allow remote\nrecovery of the private key exists in the SM2 algorithm implementation on 64 bit\nARM platforms.\n\nImpact summary: A timing side-channel in SM2 signature computations on 64 bit\nARM platforms could allow recovering the private key by an attacker..\n\nWhile remote key recovery over a network was not attempted by the reporter,\ntiming measurements revealed a timing signal which may allow such an attack.\n\nOpenSSL does not directly support certificates with SM2 keys in TLS, and so\nthis CVE is not relevant in most TLS contexts.  However, given that it is\npossible to add support for such certificates via a custom provider, coupled\nwith the fact that in such a custom provider context the private key may be\nrecoverable via remote timing measurements, we consider this to be a Moderate\nseverity issue.\n\nThe FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this\nissue, as SM2 is not an approved algorithm."
    }
  ],
  "id": "CVE-2025-9231",
  "lastModified": "2025-09-30T20:15:41.220",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-09-30T14:15:41.190",
  "references": [
    {
      "source": "openssl-security@openssl.org",
      "url": "https://github.com/openssl/openssl/commit/567f64386e43683888212226824b6a179885a0fe"
    },
    {
      "source": "openssl-security@openssl.org",
      "url": "https://github.com/openssl/openssl/commit/cba616c26ac8e7b37de5e77762e505ba5ca51698"
    },
    {
      "source": "openssl-security@openssl.org",
      "url": "https://github.com/openssl/openssl/commit/eed5adc9f969d77c94f213767acbb41ff923b6f4"
    },
    {
      "source": "openssl-security@openssl.org",
      "url": "https://github.com/openssl/openssl/commit/fc47a2ec078912b3e914fab5734535e76c4820c2"
    },
    {
      "source": "openssl-security@openssl.org",
      "url": "https://openssl-library.org/news/secadv/20250930.txt"
    }
  ],
  "sourceIdentifier": "openssl-security@openssl.org",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-385"
        }
      ],
      "source": "openssl-security@openssl.org",
      "type": "Secondary"
    }
  ]
}


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