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FKIE_CVE-2016-9604

Vulnerability from fkie_nvd - Published: 2018-07-11 13:29 - Updated: 2026-06-17 00:56
Severity
4.4 (Medium) - CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
4.4 (Medium) - CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Summary
It was discovered in the Linux kernel before 4.11-rc8 that root can gain direct access to an internal keyring, such as '.dns_resolver' in RHEL-7 or '.builtin_trusted_keys' upstream, by joining it as its session keyring. This allows root to bypass module signature verification by adding a new public key of its own devising to the keyring.
References
secalert@redhat.comhttp://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-9604.htmlThird Party Advisory
secalert@redhat.comhttp://www.securityfocus.com/bid/102135Third Party Advisory, VDB Entry
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2017:2669Third Party Advisory
secalert@redhat.comhttps://bugzilla.novell.com/show_bug.cgi?id=1035576Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9604Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee8f844e3c5a73b999edf733df1c529d6503ec2fPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-9604.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/102135Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:2669Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.novell.com/show_bug.cgi?id=1035576Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9604Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee8f844e3c5a73b999edf733df1c529d6503ec2fPatch, Vendor Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 4.11
linux linux_kernel 4.11
linux linux_kernel 4.11
linux linux_kernel 4.11
linux linux_kernel 4.11
linux linux_kernel 4.11
linux linux_kernel 4.11
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "security",
          "vendor": "kernel",
          "versions": [
            {
              "status": "affected",
              "version": "kernel 4.11-rc8"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
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          "cpeMatch": [
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              "matchCriteriaId": "BDB550B4-ED03-4369-B53F-4FF3A24ECB0D",
              "versionEndIncluding": "4.11",
              "vulnerable": true
            },
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            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "It was discovered in the Linux kernel before 4.11-rc8 that root can gain direct access to an internal keyring, such as \u0027.dns_resolver\u0027 in RHEL-7 or \u0027.builtin_trusted_keys\u0027 upstream, by joining it as its session keyring. This allows root to bypass module signature verification by adding a new public key of its own devising to the keyring."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto en el kernel de Linux en versiones anteriores a la 4.11-rc8 que root puede obtener acceso directo a un keyring interno, como \".dns_resolver\" en RHEL-7 o el upstream \".builtin_trusted_keys\" uni\u00e9ndose a \u00e9l como su keyring de sesi\u00f3n. Esto permite que root omita la verificaci\u00f3n de firmas del m\u00f3dulo a\u00f1adiendo una nueva clave p\u00fablica de su propia elaboraci\u00f3n al keyring."
    }
  ],
  "id": "CVE-2016-9604",
  "lastModified": "2026-06-17T00:56:19.690",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 2.1,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 4.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 0.8,
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        "source": "secalert@redhat.com",
        "type": "Secondary"
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        "cvssData": {
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          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 0.8,
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        "source": "nvd@nist.gov",
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  },
  "published": "2018-07-11T13:29:00.207",
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      "source": "nvd@nist.gov",
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    }
  ]
}



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Tags
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.