Security update for dbus-1
SUSE Security Update: Security update for dbus-1
Various denial of service issues were fixed in the DBUS service.
* CVE-2014-3638: dbus-daemon tracks whether method call messages
expect a reply, so that unsolicited replies can be dropped. As
currently implemented, if there are n parallel method calls in
progress, each method reply takes O(n) CPU time. A malicious user
could exploit this by opening the maximum allowed number of parallel
connections and sending the maximum number of parallel method calls
on each one, causing subsequent method calls to be unreasonably
slow, a denial of service.
* CVE-2014-3639: dbus-daemon allows a small number of "incomplete"
connections (64 by default) whose identity has not yet been
confirmed. When this limit has been reached, subsequent connections
are dropped. Alban's testing indicates that one malicious process
that makes repeated connection attempts, but never completes the
authentication handshake and instead waits for dbus-daemon to time
out and disconnect it, can cause the majority of legitimate
connection attempts to fail.
Security Issues:
* CVE-2014-3638
* CVE-2014-3638
| Announcement ID: | SUSE-SU-2014:1146-1 |
| Rating: | important |
| References: | #896453 |
| Affected Products: |
An update that fixes one vulnerability is now available.
Description:
Various denial of service issues were fixed in the DBUS service.
* CVE-2014-3638: dbus-daemon tracks whether method call messages
expect a reply, so that unsolicited replies can be dropped. As
currently implemented, if there are n parallel method calls in
progress, each method reply takes O(n) CPU time. A malicious user
could exploit this by opening the maximum allowed number of parallel
connections and sending the maximum number of parallel method calls
on each one, causing subsequent method calls to be unreasonably
slow, a denial of service.
* CVE-2014-3639: dbus-daemon allows a small number of "incomplete"
connections (64 by default) whose identity has not yet been
confirmed. When this limit has been reached, subsequent connections
are dropped. Alban's testing indicates that one malicious process
that makes repeated connection attempts, but never completes the
authentication handshake and instead waits for dbus-daemon to time
out and disconnect it, can cause the majority of legitimate
connection attempts to fail.
Security Issues:
* CVE-2014-3638
* CVE-2014-3638
Patch Instructions:
To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product:
- SUSE Linux Enterprise Software Development Kit 11 SP3:
zypper in -t patch sdksp3-dbus-1-9733 - SUSE Linux Enterprise Server 11 SP3 for VMware:
zypper in -t patch slessp3-dbus-1-9733 - SUSE Linux Enterprise Server 11 SP3:
zypper in -t patch slessp3-dbus-1-9733 - SUSE Linux Enterprise Desktop 11 SP3:
zypper in -t patch sledsp3-dbus-1-9733
To bring your system up-to-date, use "zypper patch".
Package List:
- SUSE Linux Enterprise Software Development Kit 11 SP3 (i586 ia64 ppc64 s390x x86_64):
- dbus-1-devel-1.2.10-3.31.1
- dbus-1-devel-doc-1.2.10-3.31.1
- SUSE Linux Enterprise Server 11 SP3 for VMware (i586 x86_64):
- dbus-1-1.2.10-3.31.1
- dbus-1-x11-1.2.10-3.31.1
- SUSE Linux Enterprise Server 11 SP3 for VMware (x86_64):
- dbus-1-32bit-1.2.10-3.31.1
- SUSE Linux Enterprise Server 11 SP3 (i586 ia64 ppc64 s390x x86_64):
- dbus-1-1.2.10-3.31.1
- dbus-1-x11-1.2.10-3.31.1
- SUSE Linux Enterprise Server 11 SP3 (ppc64 s390x x86_64):
- dbus-1-32bit-1.2.10-3.31.1
- SUSE Linux Enterprise Server 11 SP3 (ia64):
- dbus-1-x86-1.2.10-3.31.1
- SUSE Linux Enterprise Desktop 11 SP3 (i586 x86_64):
- dbus-1-1.2.10-3.31.1
- dbus-1-x11-1.2.10-3.31.1
- SUSE Linux Enterprise Desktop 11 SP3 (x86_64):
- dbus-1-32bit-1.2.10-3.31.1
References:
- http://support.novell.com/security/cve/CVE-2014-3638.html
- https://bugzilla.novell.com/896453
- http://download.suse.com/patch/finder/?keywords=d849773a0381e2782725dff671102c86