Vulnerability-Lookup

ubuntu-cve-2016-2856

Vulnerability from osv_ubuntu

Published

2016-03-13 00:00

Modified

2026-04-22 07:37

Summary

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.

Severity

8.4 (High)


                    
                      CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2016-2856	REPORT
	http://anonscm.debian.org/cgit/pkg-glibc/glibc.gi…	REPORT
	http://anonscm.debian.org/cgit/pkg-glibc/glibc.gi…	REPORT
	http://www.openwall.com/lists/oss-security/2016/03/07/2	REPORT
	https://ubuntu.com/security/notices/USN-2985-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2016-2856	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "eglibc-source",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-armel",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-ppc64",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-x32",
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            "binary_version": "2.19-0ubuntu6.8"
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          {
            "binary_name": "libc6-prof",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "multiarch-support",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
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            "binary_version": "2.19-0ubuntu6.8"
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      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "eglibc",
        "purl": "pkg:deb/ubuntu/eglibc@2.19-0ubuntu6.8?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.19-0ubuntu6.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
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        "2.18-0ubuntu1",
        "2.18-0ubuntu2",
        "2.18-0ubuntu4",
        "2.18-0ubuntu5",
        "2.18-0ubuntu6",
        "2.18-0ubuntu7",
        "2.19-0ubuntu2",
        "2.19-0ubuntu3",
        "2.19-0ubuntu4",
        "2.19-0ubuntu5",
        "2.19-0ubuntu6",
        "2.19-0ubuntu6.1",
        "2.19-0ubuntu6.3",
        "2.19-0ubuntu6.4",
        "2.19-0ubuntu6.5",
        "2.19-0ubuntu6.6",
        "2.19-0ubuntu6.7"
      ]
    }
  ],
  "aliases": [],
  "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": "UBUNTU-CVE-2016-2856",
  "modified": "2026-04-22T07:37:56Z",
  "published": "2016-03-13T00:00:00Z",
  "references": [
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      "url": "https://ubuntu.com/security/CVE-2016-2856"
    },
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  "severity": [
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      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2016-2856"
  ]
}

CVE-2016-2856 (GCVE-0-2016-2856)

Vulnerability from cvelistv5 – Published: 2016-03-14 01:00 – Updated: 2024-08-05 23:40

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre

References

9 references

URL	Tags
http://www.halfdog.net/Security/2015/PtChownArbit…	x_refsource_MISC
http://anonscm.debian.org/cgit/pkg-glibc/glibc.gi…	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2016/03/07/2	mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/84601	vdb-entryx_refsource_BID
http://www.ubuntu.com/usn/USN-2985-2	vendor-advisoryx_refsource_UBUNTU
http://people.canonical.com/~ubuntu-security/cve/…	x_refsource_CONFIRM
http://anonscm.debian.org/cgit/pkg-glibc/glibc.gi…	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2016/02/23/3	mailing-listx_refsource_MLIST
http://www.ubuntu.com/usn/USN-2985-1	vendor-advisoryx_refsource_UBUNTU

Date Public

2016-02-23 00:00

Show details on NVD website

JSON

To clipboard

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usn-2985-1

Vulnerability from osv_ubuntu

Published

2016-05-25 20:22

Modified

2026-04-27 14:11

Summary

eglibc, glibc vulnerabilities

Details

Martin Carpenter discovered that pt_chown in the GNU C Library did not properly check permissions for tty files. A local attacker could use this to gain administrative privileges or expose sensitive information. (CVE-2013-2207, CVE-2016-2856)

Robin Hack discovered that the Name Service Switch (NSS) implementation in the GNU C Library did not properly manage its file descriptors. An attacker could use this to cause a denial of service (infinite loop). (CVE-2014-8121)

Joseph Myers discovered that the GNU C Library did not properly handle long arguments to functions returning a representation of Not a Number (NaN). An attacker could use this to cause a denial of service (stack exhaustion leading to an application crash) or possibly execute arbitrary code. (CVE-2014-9761)

Arjun Shankar discovered that in certain situations the nss_dns code in the GNU C Library did not properly account buffer sizes when passed an unaligned buffer. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2015-1781)

Sumit Bose and Lukas Slebodnik discovered that the Name Service Switch (NSS) implementation in the GNU C Library did not handle long lines in the files databases correctly. A local attacker could use this to cause a denial of service (application crash) or possibly execute arbitrary code. (CVE-2015-5277)

Adam Nielsen discovered that the strftime function in the GNU C Library did not properly handle out-of-range argument data. An attacker could use this to cause a denial of service (application crash) or possibly expose sensitive information. (CVE-2015-8776)

Hector Marco and Ismael Ripoll discovered that the GNU C Library allowed the pointer-guarding protection mechanism to be disabled by honoring the LD_POINTER_GUARD environment variable across privilege boundaries. A local attacker could use this to exploit an existing vulnerability more easily. (CVE-2015-8777)

Szabolcs Nagy discovered that the hcreate functions in the GNU C Library did not properly check its size argument, leading to an integer overflow. An attacker could use to cause a denial of service (application crash) or possibly execute arbitrary code. (CVE-2015-8778)

Maksymilian Arciemowicz discovered a stack-based buffer overflow in the catopen function in the GNU C Library when handling long catalog names. An attacker could use this to cause a denial of service (application crash) or possibly execute arbitrary code. (CVE-2015-8779)

Florian Weimer discovered that the getnetbyname implementation in the GNU C Library did not properly handle long names passed as arguments. An attacker could use to cause a denial of service (stack exhaustion leading to an application crash). (CVE-2016-3075)

References

URL

Type

	https://ubuntu.com/security/notices/USN-2985-1	ADVISORY
	https://ubuntu.com/security/CVE-2013-2207	REPORT
	https://ubuntu.com/security/CVE-2014-8121	REPORT
	https://ubuntu.com/security/CVE-2014-9761	REPORT
	https://ubuntu.com/security/CVE-2015-1781	REPORT
	https://ubuntu.com/security/CVE-2015-5277	REPORT
	https://ubuntu.com/security/CVE-2015-8776	REPORT
	https://ubuntu.com/security/CVE-2015-8777	REPORT
	https://ubuntu.com/security/CVE-2015-8778	REPORT
	https://ubuntu.com/security/CVE-2015-8779	REPORT
	https://ubuntu.com/security/CVE-2016-2856	REPORT
	https://ubuntu.com/security/CVE-2016-3075	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2013-2207",
              "severity": [
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                  "type": "Ubuntu"
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                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2015-8777",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2015-8778",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2015-8779",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2016-2856",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2016-3075",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "eglibc-source",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-armel",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-ppc64",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-pic",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-ppc64",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-prof",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "multiarch-support",
            "binary_version": "2.19-0ubuntu6.8"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.19-0ubuntu6.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "eglibc",
        "purl": "pkg:deb/ubuntu/eglibc@2.19-0ubuntu6.8?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.19-0ubuntu6.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.17-93ubuntu4",
        "2.18-0ubuntu1",
        "2.18-0ubuntu2",
        "2.18-0ubuntu4",
        "2.18-0ubuntu5",
        "2.18-0ubuntu6",
        "2.18-0ubuntu7",
        "2.19-0ubuntu2",
        "2.19-0ubuntu3",
        "2.19-0ubuntu4",
        "2.19-0ubuntu5",
        "2.19-0ubuntu6",
        "2.19-0ubuntu6.1",
        "2.19-0ubuntu6.3",
        "2.19-0ubuntu6.4",
        "2.19-0ubuntu6.5",
        "2.19-0ubuntu6.6",
        "2.19-0ubuntu6.7"
      ]
    }
  ],
  "aliases": [],
  "details": "Martin Carpenter discovered that pt_chown in the GNU C Library did not\nproperly check permissions for tty files. A local attacker could use this\nto gain administrative privileges or expose sensitive information.\n(CVE-2013-2207, CVE-2016-2856)\n\nRobin Hack discovered that the Name Service Switch (NSS) implementation in\nthe GNU C Library did not properly manage its file descriptors. An attacker\ncould use this to cause a denial of service (infinite loop).\n(CVE-2014-8121)\n\nJoseph Myers discovered that the GNU C Library did not properly handle long\narguments to functions returning a representation of Not a Number (NaN). An\nattacker could use this to cause a denial of service (stack exhaustion\nleading to an application crash) or possibly execute arbitrary code.\n(CVE-2014-9761)\n\nArjun Shankar discovered that in certain situations the nss_dns code in the\nGNU C Library did not properly account buffer sizes when passed an\nunaligned buffer. An attacker could use this to cause a denial of service\nor possibly execute arbitrary code. (CVE-2015-1781)\n\nSumit Bose and Lukas Slebodnik discovered that the Name Service\nSwitch (NSS) implementation in the GNU C Library did not handle long\nlines in the files databases correctly. A local attacker could use\nthis to cause a denial of service (application crash) or possibly\nexecute arbitrary code. (CVE-2015-5277)\n\nAdam Nielsen discovered that the strftime function in the GNU C Library did\nnot properly handle out-of-range argument data. An attacker could use this\nto cause a denial of service (application crash) or possibly expose\nsensitive information. (CVE-2015-8776)\n\nHector Marco and Ismael Ripoll discovered that the GNU C Library allowed\nthe pointer-guarding protection mechanism to be disabled by honoring the\nLD_POINTER_GUARD environment variable across privilege boundaries. A local\nattacker could use this to exploit an existing vulnerability more easily.\n(CVE-2015-8777)\n\nSzabolcs Nagy discovered that the hcreate functions in the GNU C Library\ndid not properly check its size argument, leading to an integer overflow.\nAn attacker could use to cause a denial of service (application crash) or\npossibly execute arbitrary code. (CVE-2015-8778)\n\nMaksymilian Arciemowicz discovered a stack-based buffer overflow in the\ncatopen function in the GNU C Library when handling long catalog names. An\nattacker could use this to cause a denial of service (application crash) or\npossibly execute arbitrary code. (CVE-2015-8779)\n\nFlorian Weimer discovered that the getnetbyname implementation in the GNU C\nLibrary did not properly handle long names passed as arguments. An attacker\ncould use to cause a denial of service (stack exhaustion leading to an\napplication crash). (CVE-2016-3075)\n",
  "id": "USN-2985-1",
  "modified": "2026-04-27T14:11:22Z",
  "published": "2016-05-25T20:22:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-2985-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2013-2207"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2014-8121"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2014-9761"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2015-1781"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2015-5277"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2015-8776"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2015-8777"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2015-8778"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2015-8779"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-2856"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-3075"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "eglibc, glibc vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2013-2207",
    "UBUNTU-CVE-2014-8121",
    "UBUNTU-CVE-2014-9761",
    "UBUNTU-CVE-2015-1781",
    "UBUNTU-CVE-2015-5277",
    "UBUNTU-CVE-2015-8776",
    "UBUNTU-CVE-2015-8777",
    "UBUNTU-CVE-2015-8778",
    "UBUNTU-CVE-2015-8779",
    "UBUNTU-CVE-2016-2856",
    "UBUNTU-CVE-2016-3075"
  ]
}

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.

Action not permitted

ubuntu-cve-2016-2856

Vulnerability from osv_ubuntu

CVE-2016-2856 (GCVE-0-2016-2856)

usn-2985-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature