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CVE-2018-0735 (GCVE-0-2018-0735)

Vulnerability from cvelistv5 – Published: 2018-10-29 13:00 – Updated: 2024-09-16 19:10
VLAI
Title
Timing attack against ECDSA signature generation
Summary
The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.1.1a (Affected 1.1.1).
Severity
No CVSS data available.
CWE
  • Constant time issue
Assigner
References
Impacted products
Vendor Product Version CPE status
OpenSSL OpenSSL Affected: Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i)
Affected: Fixed in OpenSSL 1.1.1a (Affected 1.1.1)
guessed Create a notification for this product.
Date Public
2018-10-29 00:00
Credits
Samuel Weiser
Show details on NVD website
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          "value": "The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.1.1a (Affected 1.1.1)."
        },
        {
          "lang": "es",
          "value": "Se ha demostrado que el algoritmo de firmas ECDSA en OpenSSL es vulnerable a un ataque de sincronizaci\u00f3n de canal lateral. Un atacante podr\u00eda emplear variaciones en el algoritmo de firma para recuperar la clave privada. Se ha solucionado en OpenSSL 1.1.0j (afecta a 1.1.0-1.1.0i). Se ha solucionado en OpenSSL 1.1.1a (afecta a 1.1.1)."
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.1.1a (Affected 1.1.1)."
          },
          {
            "lang": "es",
            "value": "Se ha demostrado que el algoritmo de firmas ECDSA en OpenSSL es vulnerable a un ataque de sincronizaci\u00f3n de canal lateral. Un atacante podr\u00eda emplear variaciones en el algoritmo de firma para recuperar la clave privada. Se ha solucionado en OpenSSL 1.1.0j (afecta a 1.1.0-1.1.0i). Se ha solucionado en OpenSSL 1.1.1a (afecta a 1.1.1)."
          }
        ],
        "id": "CVE-2018-0735",
        "lastModified": "2024-11-21T03:38:50.413",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
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                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 4.3,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
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              "source": "nvd@nist.gov",
              "type": "Primary",
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                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
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              "exploitabilityScore": 2.2,
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              "source": "nvd@nist.gov",
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        "published": "2018-10-29T13:29:00.263",
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        "sourceIdentifier": "openssl-security@openssl.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-327"
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            "source": "nvd@nist.gov",
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    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T23:13:34+00:00",
      "cve": "CVE-2018-0735",
      "id": "CVE-2018-0735",
      "initial_release_date": "2018-10-25T00:00:00+00:00",
      "product_status:fixed": "144",
      "product_status:known_affected": "6",
      "product_status:known_not_affected": "15",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "openssl: timing side channel attack in the ECDSA signature generation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-0735.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T01:55:45Z",
      "cve": "CVE-2018-0735",
      "id": "CVE-2018-0735",
      "initial_release_date": "2023-02-15T04:34:45Z",
      "product_status:known_affected": "322",
      "product_status:known_not_affected": "774",
      "product_status:recommended": "452",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2018-0735",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-0735.json",
      "version": "68"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.