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DBusServer DBUS_COOKIE_SHA1 authentication bypass", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2019/06/11/2"}, {"name": "USN-4015-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/4015-1/"}, {"name": "USN-4015-2", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/4015-2/"}, {"name": "DSA-4462", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "https://www.debian.org/security/2019/dsa-4462"}, {"name": "20190613 [SECURITY] [DSA 4462-1] dbus security update", "tags": ["mailing-list", "x_refsource_BUGTRAQ", "x_transferred"], "url": "https://seclists.org/bugtraq/2019/Jun/16"}, {"name": "108751", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/108751"}, {"name": "[debian-lts-announce] 20190614 [SECURITY] [DLA 1818-1] dbus security update", 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"x_transferred"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00026.html"}, {"name": "GLSA-201909-08", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"], "url": "https://security.gentoo.org/glsa/201909-08"}, {"name": "RHSA-2019:2868", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "url": "https://access.redhat.com/errata/RHSA-2019:2868"}, {"name": "RHSA-2019:2870", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "url": "https://access.redhat.com/errata/RHSA-2019:2870"}, {"name": "RHSA-2019:3707", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "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", "dateReserved": "2019-06-06T00:00:00", "dateUpdated": "2024-08-04T23:32:55.158Z", "state": "PUBLISHED"}, 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(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."}, {"lang": "es", "value": "dbus anterior a versi\u00f3n 1.10.28, versi\u00f3n 1.12.x anterior a 1.12.16, y versi\u00f3n 1.13.x anterior a 1.13.12, como es usado en DBusServer en Canonst Upstart en Ubuntu versi\u00f3n 14.04 (y en algunos usos menos comunes de demonio dbus), permite suplantaci\u00f3n de identidad de cookie debido al manejo inapropiado de enlaces simb\u00f3licos (symlink) en la implementaci\u00f3n de referencia de DBUS_COOKIE_SHA1 en la biblioteca libdbus. (Esto solo afecta el mecanismo de autenticaci\u00f3n DBUS_COOKIE_SHA1). Un cliente malicioso con acceso de escritura a su propio directorio de inicio podr\u00eda manipular un enlace simb\u00f3lico ~/.dbus-keyrings para hacer que un DBusServer con un uid diferente lea y escriba en ubicaciones no deseadas. En el peor de los casos, esto podr\u00eda hacer que DBusServer reutilice una cookie que es conocida por el cliente malicioso, y tratar esa cookie como evidencia de que una conexi\u00f3n de cliente subsiguiente provino de un uid elegido por el atacante, lo que permite la omisi\u00f3n de autenticaci\u00f3n."}], "id": "CVE-2019-12749", "lastModified": "2023-11-07T03:03:40.170", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"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, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"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, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-06-11T17:29:00.517", "references": [{"source": "cve@mitre.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00059.html"}, {"source": "cve@mitre.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00092.html"}, {"source": "cve@mitre.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00026.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Mitigation", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2019/06/11/2"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/108751"}, {"source": "cve@mitre.org", "url": "https://access.redhat.com/errata/RHSA-2019:1726"}, {"source": "cve@mitre.org", "url": "https://access.redhat.com/errata/RHSA-2019:2868"}, {"source": "cve@mitre.org", "url": "https://access.redhat.com/errata/RHSA-2019:2870"}, {"source": "cve@mitre.org", "url": "https://access.redhat.com/errata/RHSA-2019:3707"}, {"source": "cve@mitre.org", "url": "https://lists.debian.org/debian-lts-announce/2019/06/msg00005.html"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU/"}, {"source": "cve@mitre.org", "url": "https://seclists.org/bugtraq/2019/Jun/16"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201909-08"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4015-1/"}, {"source": "cve@mitre.org", "url": "https://usn.ubuntu.com/4015-2/"}, {"source": "cve@mitre.org", "url": "https://www.debian.org/security/2019/dsa-4462"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2019/06/11/2"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the D-Bus project for reporting this issue. Upstream acknowledges Joe Vennix (Apple Information Security) as the original reporter.", "affected_release": [{"advisory": "RHSA-2019:1726", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "dbus-1:1.2.24-11.el6_10", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2019-07-10T00:00:00Z"}, {"advisory": "RHSA-2019:2870", "cpe": "cpe:/o:redhat:rhel_aus:6.5", "package": "dbus-1:1.2.24-9.el6_5", "product_name": "Red Hat Enterprise Linux 6.5 Advanced Update Support", "release_date": "2019-09-23T00:00:00Z"}, {"advisory": "RHSA-2019:2868", "cpe": "cpe:/o:redhat:rhel_aus:6.6", "package": "dbus-1:1.2.24-9.el6_6", "product_name": "Red Hat Enterprise Linux 6.6 Advanced Update Support", "release_date": "2019-09-23T00:00:00Z"}, {"advisory": "RHSA-2020:4032", "cpe": "cpe:/o:redhat:enterprise_linux:7", "impact": "moderate", "package": "dbus-1:1.10.24-15.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-09-29T00:00:00Z"}, {"advisory": "RHSA-2019:3707", "cpe": "cpe:/a:redhat:enterprise_linux:8", "impact": "moderate", "package": "dbus-1:1.12.8-9.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-11-05T00:00:00Z"}, {"advisory": "RHSA-2019:3707", "cpe": "cpe:/o:redhat:enterprise_linux:8", "impact": "moderate", "package": "dbus-1:1.12.8-9.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-11-05T00:00:00Z"}, {"advisory": "RHSA-2021:0949", "cpe": "cpe:/a:redhat:openshift_do:1.0::el7", "package": "openshiftdo/odo-init-image-rhel7:1.1.3-2", "product_name": "Red Hat OpenShift Do", "release_date": "2021-03-22T00:00:00Z"}], "bugzilla": {"description": "dbus: DBusServer DBUS_COOKIE_SHA1 authentication bypass", "id": "1719344", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1719344"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-287", "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.", "A flaw was found in dbus. The implementation of DBUS_COOKIE_SHA1 is susceptible to a symbolic link attack. A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause the DBusServer to read and write in unintended locations resulting in an authentication bypass. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."], "name": "CVE-2019-12749", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "dbus", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2019-06-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-12749\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-12749\nhttps://www.openwall.com/lists/oss-security/2019/06/11/2"], "statement": "This flaw is mitigated by the fact that by default, the well-known system dbus-daemon (since 2003) and the well-known session dbus-daemon (in stable releases since dbus 1.10.0 in 2015) only accept the EXTERNAL authentication mechanism, and as a result will reject DBUS_COOKIE_SHA1 at an early stage, before manipulating cookies. \nRed Hat Enterprise Linux 6 is affected by this flaw, which can be leveraged to achieve privilege escalation via upstart. This issue has been rated as having important impact for Red Hat Enterprise Linux 6.\nRed Hat Enterprise Linux 7 and 8, both ship dbus >= 1.10 and therefore are affected by this flaw only when system or session dbus-daemons are used under non-standard configurations or by third party users of DBusServer. Red Hat Enterprise Linux 7 and 8 does not ship any affected DBusServer cosumer. However third party applications may be affected.", "threat_severity": "Important", "upstream_fix": "dbus 1.10.28, dbus 1.12.16, dbus 1.13.12"}