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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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  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2018-0734",
    "datePublished": "2018-10-30T12:00:00.000Z",
    "dateReserved": "2017-11-30T00:00:00.000Z",
    "dateUpdated": "2024-09-16T23:10:36.543Z",
    "state": "PUBLISHED"
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      "cve": "CVE-2018-0734",
      "date": "2026-09-16",
      "epss": "0.12154",
      "percentile": "0.95941"
    },
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      "cve": "CVE-2018-0734",
      "id": "msrc_CVE-2018-0734",
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      "product_status:fixed": "1",
      "product_status:known_affected": "6",
      "product_status:known_not_affected": "5",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Timing attack against DSA",
      "url": "https://msrc.microsoft.com/csaf/vex/2018/msrc_cve-2018-0734.json",
      "version": "6"
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Advisory\"]},{\"url\":\"https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.tenable.com/security/tns-2018-16\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.tenable.com/security/tns-2018-17\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "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"
    }
  }
}



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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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