ubuntu-cve-2016-7056
Vulnerability from osv_ubuntu
Published
2016-12-31 00:00
Modified
2026-04-22 07:38
Summary
Details

A timing attack flaw was found in OpenSSL 1.0.1u and before that could allow a malicious user with local access to recover ECDSA P-256 private keys.

Severity
5.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssl1.0.0",
            "binary_version": "1.0.1f-1ubuntu2.22"
          },
          {
            "binary_name": "openssl",
            "binary_version": "1.0.1f-1ubuntu2.22"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "openssl",
        "purl": "pkg:deb/ubuntu/openssl@1.0.1f-1ubuntu2.22?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.1f-1ubuntu2.22"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.1e-3ubuntu1",
        "1.0.1e-4ubuntu1",
        "1.0.1e-4ubuntu2",
        "1.0.1e-4ubuntu3",
        "1.0.1e-4ubuntu4",
        "1.0.1f-1ubuntu1",
        "1.0.1f-1ubuntu2",
        "1.0.1f-1ubuntu2.1",
        "1.0.1f-1ubuntu2.2",
        "1.0.1f-1ubuntu2.3",
        "1.0.1f-1ubuntu2.4",
        "1.0.1f-1ubuntu2.5",
        "1.0.1f-1ubuntu2.7",
        "1.0.1f-1ubuntu2.8",
        "1.0.1f-1ubuntu2.11",
        "1.0.1f-1ubuntu2.12",
        "1.0.1f-1ubuntu2.15",
        "1.0.1f-1ubuntu2.16",
        "1.0.1f-1ubuntu2.17",
        "1.0.1f-1ubuntu2.18",
        "1.0.1f-1ubuntu2.19",
        "1.0.1f-1ubuntu2.20",
        "1.0.1f-1ubuntu2.21"
      ]
    }
  ],
  "aliases": [],
  "details": "A timing attack flaw was found in OpenSSL 1.0.1u and before that could allow a malicious user with local access to recover ECDSA P-256 private keys.",
  "id": "UBUNTU-CVE-2016-7056",
  "modified": "2026-04-22T07:38:02Z",
  "published": "2016-12-31T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-7056"
    },
    {
      "type": "REPORT",
      "url": "https://eprint.iacr.org/2016/1195.pdf"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3181-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2016-7056"
    }
  ],
  "related": [
    "USN-3181-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2016-7056"
  ]
}



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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.


Detection rules are retrieved from Rulezet.