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CVE-2018-0734 (GCVE-0-2018-0734)

Vulnerability from cvelistv5 – Published: 2018-10-30 12:00 – Updated: 2024-09-16 23:10
VLAI
Title
Timing attack against DSA
Summary
The OpenSSL DSA 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 1.1.1a (Affected 1.1.1). Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.0.2q (Affected 1.0.2-1.0.2p).
Severity
No CVSS data available.
CWE
  • Constant time issue
References
URL Tags
https://www.oracle.com/technetwork/security-advis… x_refsource_CONFIRM
https://usn.ubuntu.com/3840-1/ vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2018/dsa-4355 vendor-advisoryx_refsource_DEBIAN
https://security.netapp.com/advisory/ntap-2018110… x_refsource_CONFIRM
https://git.openssl.org/gitweb/?p=openssl.git%3Ba… x_refsource_CONFIRM
https://www.tenable.com/security/tns-2018-17 x_refsource_CONFIRM
https://nodejs.org/en/blog/vulnerability/november… x_refsource_CONFIRM
https://www.tenable.com/security/tns-2018-16 x_refsource_CONFIRM
http://www.securityfocus.com/bid/105758 vdb-entryx_refsource_BID
https://git.openssl.org/gitweb/?p=openssl.git%3Ba… x_refsource_CONFIRM
https://www.debian.org/security/2018/dsa-4348 vendor-advisoryx_refsource_DEBIAN
https://git.openssl.org/gitweb/?p=openssl.git%3Ba… x_refsource_CONFIRM
https://www.openssl.org/news/secadv/20181030.txt x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2019011… x_refsource_CONFIRM
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
https://security.netapp.com/advisory/ntap-2019042… x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://access.redhat.com/errata/RHSA-2019:2304 vendor-advisoryx_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:3700 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3933 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3935 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3932 vendor-advisoryx_refsource_REDHAT
https://www.oracle.com/security-alerts/cpujan2020.html x_refsource_MISC
https://www.oracle.com/security-alerts/cpuapr2020.html x_refsource_MISC
Impacted products
Vendor Product Version CPE status
OpenSSL OpenSSL Affected: Fixed in OpenSSL 1.1.1a (Affected 1.1.1)
Affected: Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i)
Affected: Fixed in OpenSSL 1.0.2q (Affected 1.0.2-1.0.2p)
guessed Create a notification for this product.
Date Public
2018-10-30 00:00
Show details on NVD website

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      "descriptions": [
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          "lang": "en",
          "value": "The OpenSSL DSA 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 1.1.1a (Affected 1.1.1). Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.0.2q (Affected 1.0.2-1.0.2p)."
        },
        {
          "lang": "es",
          "value": "Se ha demostrado que el algoritmo de firmas DSA 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 1.1.1a (afecta a 1.1.1). Se ha solucionado en OpenSSL 1.1.0j (afecta a 1.1.0-1.1.0i). Se ha solucionado en OpenSSL 1.0.2q (afecta a 1.0.2-1.0.2p)."
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      "id": "CVE-2018-0734",
      "lastModified": "2024-11-21T03:38:50.120",
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                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The OpenSSL DSA 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 1.1.1a (Affected 1.1.1). Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.0.2q (Affected 1.0.2-1.0.2p)."
          },
          {
            "lang": "es",
            "value": "Se ha demostrado que el algoritmo de firmas DSA 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 1.1.1a (afecta a 1.1.1). Se ha solucionado en OpenSSL 1.1.0j (afecta a 1.1.0-1.1.0i). Se ha solucionado en OpenSSL 1.0.2q (afecta a 1.0.2-1.0.2p)."
          }
        ],
        "id": "CVE-2018-0734",
        "lastModified": "2024-11-21T03:38:50.120",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "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,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "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",
                "version": "3.1"
              },
              "exploitabilityScore": 2.2,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2018-10-30T12:29:00.257",
        "references": [
          {
            "source": "openssl-security@openssl.org",
            "tags": [
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            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00030.html"
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            "url": "http://www.securityfocus.com/bid/105758"
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          },
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          },
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          },
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            "url": "https://www.tenable.com/security/tns-2018-17"
          }
        ],
        "sourceIdentifier": "openssl-security@openssl.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-327"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T11:47:51+00:00",
      "cve": "CVE-2018-0734",
      "id": "CVE-2018-0734",
      "initial_release_date": "2018-10-16T00:00:00+00:00",
      "product_status:fixed": "292",
      "product_status:known_affected": "17",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "openssl: timing side channel attack in the DSA signature algorithm",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-0734.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:33:53Z",
      "cve": "CVE-2018-0734",
      "id": "CVE-2018-0734",
      "initial_release_date": "2023-02-15T04:34:45Z",
      "product_status:known_affected": "569",
      "product_status:known_not_affected": "297",
      "product_status:recommended": "1090",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2018-0734",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-0734.json",
      "version": "53"
    }
  }
}



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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.

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Detection rules are retrieved from Rulezet.

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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.


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