GSD-2019-1547

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).
Aliases
Aliases
CVE-2019-1547
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{
  "GSD": {
    "alias": "CVE-2019-1547",
    "description": "Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).",
    "id": "GSD-2019-1547",
    "references": [
      "https://www.suse.com/security/cve/CVE-2019-1547.html",
      "https://www.debian.org/security/2019/dsa-4539",
      "https://www.debian.org/security/2019/dsa-4540",
      "https://access.redhat.com/errata/RHSA-2020:1840",
      "https://access.redhat.com/errata/RHSA-2020:1337",
      "https://access.redhat.com/errata/RHSA-2020:1336",
      "https://ubuntu.com/security/CVE-2019-1547",
      "https://advisories.mageia.org/CVE-2019-1547.html",
      "https://linux.oracle.com/cve/CVE-2019-1547.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2019-1547"
      ],
      "details": "Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).",
      "id": "GSD-2019-1547",
      "modified": "2023-12-13T01:23:51.566240Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "openssl-security@openssl.org",
        "DATE_PUBLIC": "2019-09-10",
        "ID": "CVE-2019-1547",
        "STATE": "PUBLIC",
        "TITLE": "ECDSA remote timing attack"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "OpenSSL",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c)"
                        },
                        {
                          "version_value": "Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k)"
                        },
                        {
                          "version_value": "Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s)"
                        }
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              "vendor_name": "OpenSSL"
            }
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        }
      },
      "credit": [
        {
          "lang": "eng",
          "value": "Cesar Pereida Garc\u00eda, Sohaib ul Hassan, Nicola Tuveri, Iaroslav Gridin, Alejandro Cabrera Aldaya, and Billy Brumley"
        }
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      "data_format": "MITRE",
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      "description": {
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          {
            "lang": "eng",
            "value": "Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s)."
          }
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      "impact": [
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          "url": "https://www.openssl.org/policies/secpolicy.html#Low",
          "value": "Low"
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          },
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              "name": "openSUSE-SU-2019:2268",
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            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20200122-0002/",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "https://security.netapp.com/advisory/ntap-20200122-0002/"
            },
            {
              "name": "N/A",
              "refsource": "N/A",
              "tags": [],
              "url": "https://www.oracle.com/security-alerts/cpuapr2020.html"
            },
            {
              "name": "USN-4376-1",
              "refsource": "UBUNTU",
              "tags": [],
              "url": "https://usn.ubuntu.com/4376-1/"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20200416-0003/",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "https://security.netapp.com/advisory/ntap-20200416-0003/"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpujul2020.html",
              "refsource": "MISC",
              "tags": [],
              "url": "https://www.oracle.com/security-alerts/cpujul2020.html"
            },
            {
              "name": "USN-4376-2",
              "refsource": "UBUNTU",
              "tags": [],
              "url": "https://usn.ubuntu.com/4376-2/"
            },
            {
              "name": "USN-4504-1",
              "refsource": "UBUNTU",
              "tags": [],
              "url": "https://usn.ubuntu.com/4504-1/"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpuoct2020.html",
              "refsource": "MISC",
              "tags": [],
              "url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
            },
            {
              "name": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10365",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10365"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 1.9,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:M/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 3.4,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 1.0,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2021-07-31T08:15Z",
      "publishedDate": "2019-09-10T17:15Z"
    }
  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.