Vulnerability-Lookup

CNVD-2019-19472

Vulnerability from cnvd - Published: 2019-06-27

Title

dbus身份验证绕过漏洞

Description

D-Bus是一种进程间通信机制，它由freedesktop.org项目提供，使用GPL许可证发行。 Ubuntu中的dbus 1.10.28之前版本，1.12.16之前的1.12.x版本和1.13.12之前的1.13.x版本存在身份验证绕过漏洞。该漏洞源于网络系统或产品中缺少身份验证措施或身份验证强度不足。攻击者可以利用此问题绕过身份验证机制并执行未经授权的操作。

Severity

低

Patch Name

dbus身份验证绕过漏洞的补丁

Patch Description

D-Bus是一种进程间通信机制，它由freedesktop.org项目提供，使用GPL许可证发行。 Ubuntu中的dbus存在身份验证绕过漏洞。该漏洞源于网络系统或产品中缺少身份验证措施或身份验证强度不足。攻击者可以利用此问题绕过身份验证机制并执行未经授权的操作。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://gitlab.freedesktop.org/dbus/dbus/commit/47b1a4c41004bf494b87370987b222c934b19016

Reference

https://nvd.nist.gov/vuln/detail/CVE-2019-12749

Impacted products

Name
['Freedesktop Dbus 1.13.10', 'Freedesktop Dbus 1.13', 'Freedesktop Dbus 1.12.14', 'Freedesktop Dbus 1.12', 'Freedesktop Dbus 1.10.26']

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2019-12749"
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  "discovererName": "Joe Vennix from Apple Information Security",
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  "submitTime": "2019-06-14",
  "title": "dbus\u8eab\u4efd\u9a8c\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2019-12749 (GCVE-0-2019-12749)

Vulnerability from cvelistv5 – Published: 2019-06-11 16:11 – Updated: 2026-02-13 19:57

Summary

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.

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-13 19:57 UTC

CWE

n/a
CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

mitre mitre root

References

18 references

URL	Tags
https://www.openwall.com/lists/oss-security/2019/…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2019/06/11/2	mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4015-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4015-2/	vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2019/dsa-4462	vendor-advisoryx_refsource_DEBIAN
https://seclists.org/bugtraq/2019/Jun/16	mailing-listx_refsource_BUGTRAQ
http://www.securityfocus.com/bid/108751	vdb-entryx_refsource_BID
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://access.redhat.com/errata/RHSA-2019:1726	vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://security.gentoo.org/glsa/201909-08	vendor-advisoryx_refsource_GENTOO
https://access.redhat.com/errata/RHSA-2019:2868	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2870	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3707	vendor-advisoryx_refsource_REDHAT
https://security.netapp.com/advisory/ntap-2024120…

Show details on NVD website

JSON

To clipboard

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            {
              "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"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-12749",
    "datePublished": "2019-06-11T16:11:45.000Z",
    "dateReserved": "2019-06-06T00:00:00.000Z",
    "dateUpdated": "2026-02-13T19:57:55.649Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.