Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-12749
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:20 UTC · Revision 1
Source evidence
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.
osv:CVE-2019-12749
Complete source record
{
"id": "c4688cb1dd1abfefd62c723432d7468b46b9e193c8ddf1ec61efced37c8c9b0a",
"url": "https://osv.dev/vulnerability/CVE-2019-12749",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-12749",
"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.",
"evidence": "osv:CVE-2019-12749",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2019-12749",
"aliases": [
"CVE-2019-12749"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://gitlab.freedesktop.org/dbus/dbus",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "983e62be144c3615bd44feb9850dc4ccd797e3b8"
},
{
"introduced": "98294ab81a4d7ef00b6de5149344d92278c38593"
},
{
"fixed": "23cc709db8fab94f11fa48772bff396b20aea8b0"
},
{
"introduced": "ee84f84a3fde6bc3d3c5e1c11adeab8f1af6db44"
},
{
"fixed": "df9dabe5212a1d4b4b652f8fcd7c2e61af4275ba"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.10.28"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.12.0"
},
{
"fixed": "1.12.16"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.13.0"
},
{
"fixed": "1.13.12"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"dbus-1.12.14",
"dbus-1.13.10",
"dbus-1.12.12",
"dbus-1.13.8",
"dbus-1.12.10",
"dbus-1.13.6",
"dbus-1.10.26",
"dbus-1.12.8",
"dbus-1.13.4",
"dbus-1.12.6",
"dbus-1.13.2",
"dbus-1.12.4",
"dbus-1.13.0",
"dbus-1.12.2",
"dbus-1.12.0",
"dbus-1.10.24",
"dbus-1.10.22",
"dbus-1.10.20",
"dbus-1.10.18",
"dbus-1.10.16",
"dbus-1.10.14",
"dbus-1.10.12",
"dbus-1.10.10",
"dbus-1.10.8",
"dbus-1.10.6",
"dbus-1.10.4",
"dbus-1.10.2",
"dbus-1.10.0",
"dbus-1.9.20",
"dbus-1.9.18",
"dbus-1.9.16",
"dbus-1.9.14",
"dbus-1.9.12",
"dbus-1.9.10",
"dbus-1.9.8",
"dbus-1.9.4",
"dbus-1.9.2",
"dbus-1.9.0",
"dbus-1.8.0",
"dbus-1.7.10",
"dbus-1.7.8",
"dbus-1.7.6",
"dbus-1.7.4",
"dbus-1.7.2",
"dbus-1.7.0",
"dbus-1.6.0",
"dbus-1.5.12",
"dbus-1.5.10",
"dbus-1.5.8",
"dbus-1.5.6",
"dbus-1.5.4",
"dbus-1.5.2",
"dbus-1.5.0",
"dbus-1.4.6",
"dbus-1.4.4",
"dbus-0.22",
"dbus-1.4.1",
"dbus-1.4.0",
"dbus-1.3.1",
"dbus-1.3.0",
"dbus-1.2.1",
"dbus-1.1.20",
"dbus-1.1.4",
"dbus-1.1.3",
"dbus-1.1.2",
"dbus-1.1.0",
"dbus-1.0.0",
"dbus-0.95",
"dbus-0.94",
"dbus-0.93",
"dbus-0.92",
"dbus-0.91",
"dbus-0.90",
"dbus-0.62",
"dbus-0.61",
"dbus-0.60",
"dbus-0.50",
"dbus-0.36",
"dbus-0.35",
"dbus-0.34.0",
"dbus-0.33.0",
"dbus-0.32.0",
"dbus-0.31.0",
"dbus-0.23",
"dbus-0.21",
"dbus-0.20",
"dbus-before-object-names-merge",
"dbus-0.13",
"dbus-0.12",
"dbus-object-names-branchpoint",
"dbus-0.11",
"dbus-0.10",
"dbus-0.9",
"dbus-0.8",
"dbus-0.7",
"dbus-0.6",
"dbus-0.5",
"dbus-0.4",
"dbus-0.3",
"dbus-0.2",
"dbus-0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-12749.json"
}
}
],
"modified": "2026-10-24T10:30:17.469084525Z",
"provider": "osv",
"references": [
"https://lists.debian.org/debian-lts-announce/2019/06/msg00005.html",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU/",
"https://seclists.org/bugtraq/2019/Jun/16",
"https://usn.ubuntu.com/4015-2/",
"https://access.redhat.com/errata/RHSA-2019:1726",
"https://access.redhat.com/errata/RHSA-2019:2868",
"https://access.redhat.com/errata/RHSA-2019:2870",
"https://access.redhat.com/errata/RHSA-2019:3707",
"https://security.gentoo.org/glsa/201909-08",
"https://security.netapp.com/advisory/ntap-20241206-0010/",
"https://usn.ubuntu.com/4015-1/",
"https://www.debian.org/security/2019/dsa-4462",
"https://www.openwall.com/lists/oss-security/2019/06/11/2"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
},
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
},
{
"introduced": "18.10"
},
{
"last_affected": "18.10"
},
{
"introduced": "19.04"
},
{
"last_affected": "19.04"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2019-12749",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 429571,
"published_at": "2019-06-11T17:29:00.517+00:00"
}