gsd-2016-2856
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk. NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option.
Aliases
Aliases
CVE-2016-2856


To clipboard 

{
  "GSD": {
    "alias": "CVE-2016-2856",
    "description": "pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk.  NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option.",
    "id": "GSD-2016-2856",
    "references": [
      "https://ubuntu.com/security/CVE-2016-2856",
      "https://packetstormsecurity.com/files/cve/CVE-2016-2856"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2016-2856"
      ],
      "details": "pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk.  NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option.",
      "id": "GSD-2016-2856",
      "modified": "2023-12-13T01:21:20.019475Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2016-2856",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk.  NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/",
            "refsource": "MISC",
            "url": "http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/"
          },
          {
            "name": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=11475c083282c1582c4dd72eecfcb2b7d308c958",
            "refsource": "CONFIRM",
            "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=11475c083282c1582c4dd72eecfcb2b7d308c958"
          },
          {
            "name": "[oss-security] 20160306 Re: Access to /dev/pts devices via pt_chown and user namespaces",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2016/03/07/2"
          },
          {
            "name": "84601",
            "refsource": "BID",
            "url": "http://www.securityfocus.com/bid/84601"
          },
          {
            "name": "USN-2985-2",
            "refsource": "UBUNTU",
            "url": "http://www.ubuntu.com/usn/USN-2985-2"
          },
          {
            "name": "http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html",
            "refsource": "CONFIRM",
            "url": "http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html"
          },
          {
            "name": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=09f7764882a81e13e7b5d87d715412283a6ce403",
            "refsource": "CONFIRM",
            "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=09f7764882a81e13e7b5d87d715412283a6ce403"
          },
          {
            "name": "[oss-security] 20160223 Access to /dev/pts devices via pt_chown and user namespaces",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2016/02/23/3"
          },
          {
            "name": "USN-2985-1",
            "refsource": "UBUNTU",
            "url": "http://www.ubuntu.com/usn/USN-2985-1"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": true
                  }
                ],
                "operator": "OR"
              },
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "versionEndIncluding": "2.18",
                    "vulnerable": false
                  }
                ],
                "operator": "OR"
              }
            ],
            "cpe_match": [],
            "operator": "AND"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2016-2856"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk.  NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-264"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=09f7764882a81e13e7b5d87d715412283a6ce403",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=09f7764882a81e13e7b5d87d715412283a6ce403"
            },
            {
              "name": "[oss-security] 20160223 Access to /dev/pts devices via pt_chown and user namespaces",
              "refsource": "MLIST",
              "tags": [],
              "url": "http://www.openwall.com/lists/oss-security/2016/02/23/3"
            },
            {
              "name": "http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/",
              "refsource": "MISC",
              "tags": [],
              "url": "http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/"
            },
            {
              "name": "[oss-security] 20160306 Re: Access to /dev/pts devices via pt_chown and user namespaces",
              "refsource": "MLIST",
              "tags": [],
              "url": "http://www.openwall.com/lists/oss-security/2016/03/07/2"
            },
            {
              "name": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=11475c083282c1582c4dd72eecfcb2b7d308c958",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie\u0026id=11475c083282c1582c4dd72eecfcb2b7d308c958"
            },
            {
              "name": "http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html",
              "refsource": "CONFIRM",
              "tags": [],
              "url": "http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html"
            },
            {
              "name": "USN-2985-2",
              "refsource": "UBUNTU",
              "tags": [],
              "url": "http://www.ubuntu.com/usn/USN-2985-2"
            },
            {
              "name": "USN-2985-1",
              "refsource": "UBUNTU",
              "tags": [],
              "url": "http://www.ubuntu.com/usn/USN-2985-1"
            },
            {
              "name": "84601",
              "refsource": "BID",
              "tags": [],
              "url": "http://www.securityfocus.com/bid/84601"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 7.2,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "exploitabilityScore": 2.5,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2016-11-28T20:05Z",
      "publishedDate": "2016-03-14T01:59Z"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.