| Description: | Description:
The remote host is missing updates announced in
advisory RHSA-2011:1189.
Security issues:
* Using PCI passthrough without interrupt remapping support allowed KVM
guests to generate MSI interrupts and thus potentially inject traps. A
privileged guest user could use this flaw to crash the host or possibly
escalate their privileges on the host. The fix for this issue can prevent
PCI passthrough working and guests starting. Refer to Red Hat Bugzilla bug
715555 for details. (CVE-2011-1898, Important)
* Flaw in the client-side NLM implementation could allow a local,
unprivileged user to cause a denial of service. (CVE-2011-2491, Important)
* Integer underflow in the Bluetooth implementation could allow a remote
attacker to cause a denial of service or escalate their privileges by
sending a specially-crafted request to a target system via Bluetooth.
(CVE-2011-2497, Important)
* Buffer overflows in the netlink-based wireless configuration interface
implementation could allow a local user, who has the CAP_NET_ADMIN
capability, to cause a denial of service or escalate their privileges on
systems that have an active wireless interface. (CVE-2011-2517, Important)
* Flaw in the way the maximum file offset was handled for ext4 file systems
could allow a local, unprivileged user to cause a denial of service.
(CVE-2011-2695, Important)
* Flaw allowed napi_reuse_skb() to be called on VLAN packets. An attacker
on the local network could use this flaw to send crafted packets to a
target, possibly causing a denial of service. (CVE-2011-1576, Moderate)
* Integer signedness error in next_pidmap() could allow a local,
unprivileged user to cause a denial of service. (CVE-2011-1593, Moderate)
* Race condition in the memory merging support (KSM) could allow a local,
unprivileged user to cause a denial of service. KSM is off by default, but
on systems running VDSM, or on KVM hosts, it is likely turned on by the
ksm/ksmtuned services. (CVE-2011-2183, Moderate)
* Flaw in inet_diag_bc_audit() could allow a local, unprivileged user to
cause a denial of service. (CVE-2011-2213, Moderate)
* Flaw in the way space was allocated in the Global File System 2 (GFS2)
implementation. If the file system was almost full, and a local,
unprivileged user made an fallocate() request, it could result in a denial
of service. Setting quotas to prevent users from using all available disk
space would prevent exploitation of this flaw. (CVE-2011-2689, Moderate)
* Local, unprivileged users could send signals via the sigqueueinfo system
call, with si_code set to SI_TKILL and with spoofed process and user IDs,
to other processes. This flaw does not allow existing permission checks to
be bypassed
signals can only be sent if your privileges allow you to
already do so. (CVE-2011-1182, Low)
* Heap overflow in the EFI GUID Partition Table (GPT) implementation could
allow a local attacker to cause a denial of service by mounting a disk
containing crafted partition tables. (CVE-2011-1776, Low)
* Structure padding in two structures in the Bluetooth implementation was
not initialized properly before being copied to user-space, possibly
allowing local, unprivileged users to leak kernel stack memory to
user-space. (CVE-2011-2492, Low)
* /proc/[PID]/io is world-readable by default. Previously, these files
could be read without any further restrictions. A local, unprivileged user
could read these files, belonging to other, possibly privileged processes
to gather confidential information, such as the length of a password used
in a process. (CVE-2011-2495, Low)
Red Hat would like to thank Vasily Averin for reporting CVE-2011-2491
Dan
Rosenberg for reporting CVE-2011-2497 and CVE-2011-2213
Ryan Sweat for
reporting CVE-2011-1576
Robert Swiecki for reporting CVE-2011-1593
Andrea
Righi for reporting CVE-2011-2183
Julien Tinnes of the Google Security
Team for reporting CVE-2011-1182
Timo Warns for reporting CVE-2011-1776
Marek Kroemeke and Filip Palian for reporting CVE-2011-2492
and Vasiliy
Kulikov of Openwall for reporting CVE-2011-2495.
Solution:
Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date
http://rhn.redhat.com/errata/RHSA-2011-1189.html
Risk factor : Critical
CVSS Score:
8.3
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