CVE-2019-12749
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.55% probability · 46th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-59
- Affected
- freedesktop/dbus · canonical/ubuntu linux
- Source
- cve@mitre.org
EPSS 0.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00059.html
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00092.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00026.html
- http://www.openwall.com/lists/oss-security/2019/06/11/2Mailing List, Mitigation, Third Party Advisory
- http://www.securityfocus.com/bid/108751
- 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://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://security.gentoo.org/glsa/201909-08
- https://usn.ubuntu.com/4015-1/Third Party Advisory
- https://usn.ubuntu.com/4015-2/
- https://www.debian.org/security/2019/dsa-4462
- https://www.openwall.com/lists/oss-security/2019/06/11/2Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00059.html
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00092.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00026.html
- http://www.openwall.com/lists/oss-security/2019/06/11/2Mailing List, Mitigation, Third Party Advisory
- http://www.securityfocus.com/bid/108751
- 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://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://security.gentoo.org/glsa/201909-08
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.