CVE-2019-12749
First published: Tue Jun 11 2019(Updated: )
A flaw was discovered in dbus where 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. This could result in authentication bypass.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Freedesktop Dbus | <1.10.28 | |
| Freedesktop Dbus | >=1.12.0<1.12.16 | |
| Freedesktop Dbus | >=1.13.0<1.13.12 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =18.10 | |
| Canonical Ubuntu Linux | =19.04 | |
| redhat/dbus | <1.10.28 | 1.10.28 |
| redhat/dbus | <1.12.16 | 1.12.16 |
| redhat/dbus | <1.13.12 | 1.13.12 |
| IBM Security Guardium | <=10.5 | |
| IBM Security Guardium | <=10.6 | |
| IBM Security Guardium | <=11.0 | |
| IBM Security Guardium | <=11.1 | |
| IBM Security Guardium | <=11.2 | |
| IBM Security Guardium | <=11.3 | |
| debian/dbus | 1.12.28-0+deb11u1 1.12.24-0+deb11u1 1.14.10-1~deb12u1 1.14.10-4 |
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Reference Links
- https://gitlab.freedesktop.org/dbus/dbus/issues/269
- https://gitlab.freedesktop.org/dbus/dbus/commit/525c2314c56504fb232f9ec7f25cf7dda4d4a1c4
- https://gitlab.freedesktop.org/dbus/dbus/commit/c251e7ea9525c1fc81360bbaf48f86ef6a0ad598
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=930375
- 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/2019/06/11/2
- 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@lists.fedoraproject.org/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU/
- https://seclists.org/bugtraq/2019/Jun/16
- https://security.gentoo.org/glsa/201909-08
- https://usn.ubuntu.com/4015-1/
- https://usn.ubuntu.com/4015-2/
- https://www.debian.org/security/2019/dsa-4462
- https://www.openwall.com/lists/oss-security/2019/06/11/2
- https://launchpad.net/bugs/cve/CVE-2019-12749
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU/
- https://gitlab.freedesktop.org/dbus/dbus/commit/47b1a4c41004bf494b87370987b222c934b19016
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1720995
- https://access.redhat.com/security/cve/cve-2019-12749
- https://access.redhat.com/security/cve/CVE-2019-12749
- https://access.redhat.com/errata/RHSA-2020:4032
- https://bugzilla.redhat.com/show_bug.cgi?id=1719344
- https://exchange.xforce.ibmcloud.com/vulnerabilities/162386
- https://www.ibm.com/support/pages/node/6455281 (Advisory)
- https://security-tracker.debian.org/tracker/CVE-2019-12749
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12749
- https://nvd.nist.gov/vuln/detail/CVE-2019-12749
- https://ubuntu.com/security/CVE-2019-12749
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2019-12749.
What is the severity of CVE-2019-12749?
The severity of CVE-2019-12749 is critical with a severity value of 9.1.
What is the affected software for CVE-2019-12749?
The affected software for CVE-2019-12749 includes dbus versions 1.10.x, 1.12.x, and 1.13.x.
How can a remote attacker exploit this vulnerability?
A remote attacker can exploit this vulnerability through cookie spoofing caused by symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library.
Is there a fix available for CVE-2019-12749?
Yes, there are fixes available for CVE-2019-12749. Please refer to the vendor-specific advisories for the appropriate remediation steps.
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