gsd-2019-12749
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent client connection came from an attacker-chosen uid, allowing authentication bypass.
Aliases
Aliases
CVE-2019-12749


To clipboard 

{
   GSD: {
      alias: "CVE-2019-12749",
      description: "dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent client connection came from an attacker-chosen uid, allowing authentication bypass.",
      id: "GSD-2019-12749",
      references: [
         "https://www.suse.com/security/cve/CVE-2019-12749.html",
         "https://www.debian.org/security/2019/dsa-4462",
         "https://access.redhat.com/errata/RHSA-2020:4032",
         "https://access.redhat.com/errata/RHSA-2019:3707",
         "https://access.redhat.com/errata/RHSA-2019:2870",
         "https://access.redhat.com/errata/RHSA-2019:2868",
         "https://access.redhat.com/errata/RHSA-2019:1726",
         "https://ubuntu.com/security/CVE-2019-12749",
         "https://advisories.mageia.org/CVE-2019-12749.html",
         "https://security.archlinux.org/CVE-2019-12749",
         "https://alas.aws.amazon.com/cve/html/CVE-2019-12749.html",
         "https://linux.oracle.com/cve/CVE-2019-12749.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2019-12749",
         ],
         details: "dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent client connection came from an attacker-chosen uid, allowing authentication bypass.",
         id: "GSD-2019-12749",
         modified: "2023-12-13T01:23:43.826630Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "cve@mitre.org",
            ID: "CVE-2019-12749",
            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: "dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent client connection came from an attacker-chosen uid, allowing authentication bypass.",
               },
            ],
         },
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "n/a",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "https://www.openwall.com/lists/oss-security/2019/06/11/2",
                  refsource: "MISC",
                  url: "https://www.openwall.com/lists/oss-security/2019/06/11/2",
               },
               {
                  name: "[oss-security] 20190611 CVE-2019-12749: DBusServer DBUS_COOKIE_SHA1 authentication bypass",
                  refsource: "MLIST",
                  url: "http://www.openwall.com/lists/oss-security/2019/06/11/2",
               },
               {
                  name: "USN-4015-1",
                  refsource: "UBUNTU",
                  url: "https://usn.ubuntu.com/4015-1/",
               },
               {
                  name: "USN-4015-2",
                  refsource: "UBUNTU",
                  url: "https://usn.ubuntu.com/4015-2/",
               },
               {
                  name: "DSA-4462",
                  refsource: "DEBIAN",
                  url: "https://www.debian.org/security/2019/dsa-4462",
               },
               {
                  name: "20190613 [SECURITY] [DSA 4462-1] dbus security update",
                  refsource: "BUGTRAQ",
                  url: "https://seclists.org/bugtraq/2019/Jun/16",
               },
               {
                  name: "108751",
                  refsource: "BID",
                  url: "http://www.securityfocus.com/bid/108751",
               },
               {
                  name: "[debian-lts-announce] 20190614 [SECURITY] [DLA 1818-1] dbus security update",
                  refsource: "MLIST",
                  url: "https://lists.debian.org/debian-lts-announce/2019/06/msg00005.html",
               },
               {
                  name: "FEDORA-2019-d5ded5326b",
                  refsource: "FEDORA",
                  url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU/",
               },
               {
                  name: "openSUSE-SU-2019:1604",
                  refsource: "SUSE",
                  url: "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00059.html",
               },
               {
                  name: "openSUSE-SU-2019:1671",
                  refsource: "SUSE",
                  url: "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00092.html",
               },
               {
                  name: "RHSA-2019:1726",
                  refsource: "REDHAT",
                  url: "https://access.redhat.com/errata/RHSA-2019:1726",
               },
               {
                  name: "openSUSE-SU-2019:1750",
                  refsource: "SUSE",
                  url: "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00026.html",
               },
               {
                  name: "GLSA-201909-08",
                  refsource: "GENTOO",
                  url: "https://security.gentoo.org/glsa/201909-08",
               },
               {
                  name: "RHSA-2019:2868",
                  refsource: "REDHAT",
                  url: "https://access.redhat.com/errata/RHSA-2019:2868",
               },
               {
                  name: "RHSA-2019:2870",
                  refsource: "REDHAT",
                  url: "https://access.redhat.com/errata/RHSA-2019:2870",
               },
               {
                  name: "RHSA-2019:3707",
                  refsource: "REDHAT",
                  url: "https://access.redhat.com/errata/RHSA-2019:3707",
               },
            ],
         },
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "1.12.16",
                        versionStartIncluding: "1.12.0",
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "1.10.28",
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "1.13.12",
                        versionStartIncluding: "1.13.0",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "cve@mitre.org",
               ID: "CVE-2019-12749",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "en",
                     value: "dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent client connection came from an attacker-chosen uid, allowing authentication bypass.",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "CWE-59",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "https://www.openwall.com/lists/oss-security/2019/06/11/2",
                     refsource: "MISC",
                     tags: [
                        "Mailing List",
                        "Third Party Advisory",
                     ],
                     url: "https://www.openwall.com/lists/oss-security/2019/06/11/2",
                  },
                  {
                     name: "[oss-security] 20190611 CVE-2019-12749: DBusServer DBUS_COOKIE_SHA1 authentication bypass",
                     refsource: "MLIST",
                     tags: [
                        "Mailing List",
                        "Mitigation",
                        "Third Party Advisory",
                     ],
                     url: "http://www.openwall.com/lists/oss-security/2019/06/11/2",
                  },
                  {
                     name: "USN-4015-1",
                     refsource: "UBUNTU",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://usn.ubuntu.com/4015-1/",
                  },
                  {
                     name: "USN-4015-2",
                     refsource: "UBUNTU",
                     tags: [],
                     url: "https://usn.ubuntu.com/4015-2/",
                  },
                  {
                     name: "DSA-4462",
                     refsource: "DEBIAN",
                     tags: [],
                     url: "https://www.debian.org/security/2019/dsa-4462",
                  },
                  {
                     name: "20190613 [SECURITY] [DSA 4462-1] dbus security update",
                     refsource: "BUGTRAQ",
                     tags: [],
                     url: "https://seclists.org/bugtraq/2019/Jun/16",
                  },
                  {
                     name: "108751",
                     refsource: "BID",
                     tags: [],
                     url: "http://www.securityfocus.com/bid/108751",
                  },
                  {
                     name: "[debian-lts-announce] 20190614 [SECURITY] [DLA 1818-1] dbus security update",
                     refsource: "MLIST",
                     tags: [],
                     url: "https://lists.debian.org/debian-lts-announce/2019/06/msg00005.html",
                  },
                  {
                     name: "FEDORA-2019-d5ded5326b",
                     refsource: "FEDORA",
                     tags: [],
                     url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU/",
                  },
                  {
                     name: "openSUSE-SU-2019:1604",
                     refsource: "SUSE",
                     tags: [],
                     url: "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00059.html",
                  },
                  {
                     name: "openSUSE-SU-2019:1671",
                     refsource: "SUSE",
                     tags: [],
                     url: "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00092.html",
                  },
                  {
                     name: "RHSA-2019:1726",
                     refsource: "REDHAT",
                     tags: [],
                     url: "https://access.redhat.com/errata/RHSA-2019:1726",
                  },
                  {
                     name: "openSUSE-SU-2019:1750",
                     refsource: "SUSE",
                     tags: [],
                     url: "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00026.html",
                  },
                  {
                     name: "GLSA-201909-08",
                     refsource: "GENTOO",
                     tags: [],
                     url: "https://security.gentoo.org/glsa/201909-08",
                  },
                  {
                     name: "RHSA-2019:2870",
                     refsource: "REDHAT",
                     tags: [],
                     url: "https://access.redhat.com/errata/RHSA-2019:2870",
                  },
                  {
                     name: "RHSA-2019:2868",
                     refsource: "REDHAT",
                     tags: [],
                     url: "https://access.redhat.com/errata/RHSA-2019:2868",
                  },
                  {
                     name: "RHSA-2019:3707",
                     refsource: "REDHAT",
                     tags: [],
                     url: "https://access.redhat.com/errata/RHSA-2019:3707",
                  },
               ],
            },
         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "LOW",
                  accessVector: "LOCAL",
                  authentication: "NONE",
                  availabilityImpact: "NONE",
                  baseScore: 3.6,
                  confidentialityImpact: "PARTIAL",
                  integrityImpact: "PARTIAL",
                  vectorString: "AV:L/AC:L/Au:N/C:P/I:P/A:N",
                  version: "2.0",
               },
               exploitabilityScore: 3.9,
               impactScore: 4.9,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "LOW",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  attackComplexity: "LOW",
                  attackVector: "LOCAL",
                  availabilityImpact: "NONE",
                  baseScore: 7.1,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "HIGH",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
                  version: "3.0",
               },
               exploitabilityScore: 1.8,
               impactScore: 5.2,
            },
         },
         lastModifiedDate: "2020-08-24T17:37Z",
         publishedDate: "2019-06-11T17:29Z",
      },
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



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.