Impact: denial of service (force system services to exit)
Access required: local
Versions affected by CVE-2014-3532: dbus >= 1.3.0 on Linux >= 2.6.37-rc4
Versions affected by CVE-2014-3533: dbus >= 1.3.0 on all Unix platforms
Alban Crequy at Collabora Ltd. discovered a bug in dbus-daemon's support
for file descriptor passing. A malicious process could force system
services or user applications to be disconnected from the D-Bus system
bus by sending them a message containing a file descriptor, then causing
that file descriptor to exceed the kernel's maximum recursion depth
(itself introduced to fix a DoS) before dbus-daemon forwards the message
to the victim process. Most services and applications exit when
disconnected from the system bus, leading to a denial of service. This
is tracked as fd.o#80163 and CVE-2014-3532.
Additionally, Alban discovered that bug fd.o#79694, a bug previously
reported by Alejandro Martínez Suárez which was not believed to be a
security flaw, could be used for a similar denial of service, by causing
dbus-daemon to attempt to forward invalid file descriptors to a victim
process when file descriptors become associated with the wrong message.
Its security implications are tracked as fd.o#80469 and CVE-2014-3533.
For the 1.8.x stable branch, these vulnerabilities are fixed in version
1.8.6. For the 1.6.x old-stable branch, these vulnerabilities are fixed
in version 1.6.22.
All earlier versions of dbus with the file descriptor passing feature
(1.3.0 and up) are believed to be vulnerable. Distributions that
backport security fixes should backport git commits
Please, test and stabilize:
Stable for HPPA.
Maintainer(s), please cleanup.
Security, please add it to the existing request, or file a new one.
Arches, Thank you for your work
Maintainer(s), please drop the vulnerable version(s).
New GLSA Request filed.
dbus 1.3.0 before 1.6.22 and 1.8.x before 1.8.6 allows local users to cause
a denial of service (disconnect) via a certain sequence of crafted messages
that cause the dbus-daemon to forward a message containing an invalid file
dbus 1.3.0 before 1.6.22 and 1.8.x before 1.8.6, when running on Linux
2.6.37-rc4 or later, allows local users to cause a denial of service
(system-bus disconnect of other services or applications) by sending a
message containing a file descriptor, then exceeding the maximum recursion
depth before the initial message is forwarded.
Maintainer(s), Thank you for cleanup!
This issue was resolved and addressed in
GLSA 201412-12 at http://security.gentoo.org/glsa/glsa-201412-12.xml
by GLSA coordinator Mikle Kolyada (Zlogene).