[Ksplice][VZ4.6-Updates] New updates available via Ksplice (CU-2.6.18-028stab085.2)
Tim Abbott
tabbott at ksplice.com
Fri Mar 18 10:42:45 PDT 2011
Synopsis: CU-2.6.18-028stab085.2 can now be patched using Ksplice
CVEs: CVE-2010-3296 CVE-2010-3432 CVE-2010-3442 CVE-2010-3699 CVE-2010-3858 CVE-2010-3859 CVE-2010-3865 CVE-2010-3876 CVE-2010-3877 CVE-2010-3880 CVE-2010-4072 CVE-2010-4073 CVE-2010-4077 CVE-2010-4080 CVE-2010-4081 CVE-2010-4083 CVE-2010-4157 CVE-2010-4158 CVE-2010-4161 CVE-2010-4238 CVE-2010-4242 CVE-2010-4243 CVE-2010-4249 CVE-2010-4258 CVE-2010-4526 CVE-2010-4655
Red Hat Security Advisory Severity: Important
Systems running Virtuozzo 4.6 can now use Ksplice to patch against the
latest Parallels Virtuozzo Containers 4.6 kernel security update,
CU-2.6.18-028stab085.2.
INSTALLING THE UPDATES
We recommend that all users of Ksplice Uptrack on Virtuozzo 4.6 install
these updates. You can install these updates by running:
# /usr/sbin/uptrack-upgrade -y
On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to take
any additional action.
DESCRIPTION
* CVE-2010-3432: Remote denial of service vulnerability in SCTP.
The sctp_outq_flush() function can call sctp_packet_reset() on a packet
structure that has already been filled with chunks. This resets the
packet length but does not remove the chunks from the list; the SCTP code
then re-initializes the packet, which because of the incorrect length
could overflow the skb, resulting in a kernel panic.
* CVE-2010-3442: Heap corruption vulnerability in ALSA core.
The snd_ctl_new() function allocates space for a snd_kcontrol struct by
performing arithmetic operations on a user-provided size without checking
for integer overflow. This allows an unprivileged user to write an
arbitrary value repeatedly past the bounds of this chunk, resulting in
heap corruption.
* CVE-2010-3865: Integer overflow in RDS rdma page counting.
An integer overflow flaw was found in the Linux kernel's Reliable Datagram
Sockets (RDS) protocol implementation. A local, unprivileged user could
use this flaw to cause a denial of service or escalate their privileges.
* CVE-2010-3876: Kernel information leak in packet subsystem.
The packet_getname_spkt function doesn't initiatilize all members of a
sockaddr struct before copying it to userland, which allows unprivileged
users to read uninitialized stack memory.
* CVE-2010-4083: Kernel information leak in semctl syscall.
The semctl system call allows unprivileged users to read uninitialized
kernel stack memory, because various fields of a semid_ds struct declared
on the stack are not altered or zeroed before being copied back to the
user.
* CVE-2010-3699: Denial of service vulnerability in Xen block I/O driver.
A flaw was found in the Xenbus code for the unified block-device I/O
interface back end. A privileged guest user could use this flaw to cause
a denial of service on the host system running the Xen hypervisor.
(CVE-2010-3699, Moderate)
* CVE-2010-4242: NULL pointer dereference in Bluetooth HCI UART driver.
A NULL pointer dereference flaw was found in the Bluetooth HCI UART driver
in the Linux kernel. A local, unprivileged user could use this flaw to
cause a denial of service. (CVE-2010-4242, Moderate).
* CVE-2010-4157: Memory corruption in Intel/ICP RAID driver.
An integer overflow in ioc_general() may cause the computation of an
incorrect buffer size, leading to memory corruption.
* CVE-2010-3880: Logic error in INET_DIAG bytecode auditing.
The INET-DIAG subsystem is inconsistent about how it looks up the bytecode
contained in a netlink message, making it possible for a user to cause the
kernel to execute unaudited INET-DIAG bytecode. This can be abused to make
the kernel enter an infinite loop, and possibly other consequences.
* CVE-2010-3858: Denial of service vulnerability with large argument lists.
Missing sanity checks were found in setup_arg_pages() in the Linux kernel.
When making the size of the argument and environment area on the stack
very large, it could trigger a BUG_ON(), resulting in a local denial of
service. (CVE-2010-3858, Moderate).
* Mitigate denial of service attacks with large argument lists.
This update improves interactivity and makes SIGKILL more effective at
responding to issues where an attacker could make a system unresponsive
through various attacks involving processes with very large argument
lists.
* CVE-2010-4161: Deadlock in socket queue subsystem.
The fix for Red Hat Bugzilla bug 484590 as provided in RHSA-2009:1243
introduced a deadlock in the socket queue subsystem. A local,
unprivileged user could use this flaw to cause a denial of service.
(CVE-2010-4161, Moderate)
* CVE-2010-3859: Heap overflow vulnerability in TIPC protocol.
A heap overflow flaw in the Linux kernel's Transparent Inter-Process
Communication protocol (TIPC) implementation could allow a local,
unprivileged user to escalate their privileges. (CVE-2010-3859,
Important).
* CVE-2010-3296: Kernel information leak in cxgb driver.
The CHELSIO_GET_QSET_NUM device ioctl allows unprivileged users to read 4
bytes of uninitialized stack memory, because the "addr" member of the
ch_reg struct declared on the stack in cxgb_extension_ioctl() is not
altered or zeroed before being copied back to the user.
* CVE-2010-3877: Kernel information leak in tipc driver.
The get_name function in net/tipc/socket.c did not properly initialize a
certain structure, which allows local users to obtain potentially
sensitive information from kernel stack memory by reading a copy of this
structure.
* CVE-2010-4072: Kernel information leak in ipc shm subsystem.
Several functions in the System V IPC shared memory subsystem did not
properly clear fields before copying data to user space, leaking data from
uninitialized kernel stack memory to user space.
* CVE-2010-4073: Kernel information leaks in ipc compat subsystem.
Several functions in the System V IPC 32-bit compatability subsystem did
not properly clear fields before copying data to user space, leaking data
from uninitialized kernel stack memory to user space.
* Integer overflow in sys_remap_file_pages.
The remap_file_pages() system call in fremap.c has an integer overflow bug
that is exploitable for denial of service and potentially other
consequences.
* CVE-2010-4258: Failure to revert address limit override after oops.
If a kernel oops occurred with a kernel address limit override in place,
the kernel did not properly reset the address limit before writing to a
user-controlled address, potentially allowing a local user to escalate a
denial-of-service attack into privilege escalation.
* CVE-2010-4077: Kernel information leak in nozomi driver.
The TIOCGICOUNT device ioctl allows unprivileged users to read
uninitialized stack memory, because the "reserved" member of the
serial_icounter_struct struct declared on the stack is not altered or
zeroed before being copied back to the user.
* CVE-2010-4080 and CVE-2010-4081: Information leaks in sound drivers.
The SNDRV_HDSP_IOCTL_GET_CONFIG_INFO and SNDRV_HDSP_IOCTL_GET_CONFIG_INFO
ioctls in hdspm.c and hdsp.c allow unprivileged users to read
uninitialized kernel stack memory, because several fields of the
hdsp{m}_config_info structs declared on the stack are not altered or
zeroed before being copied back to the user.
* CVE-2010-4238: Xen host crash with CDROM drives and Xen blkback driver.
A missing sanity check was found in vbd_create() in the Xen hypervisor
implementation. As CD-ROM drives are not supported by the blkback
back-end driver, attempting to use a virtual CD-ROM drive with blkback
could trigger a denial of service (crash) on the host system running the
Xen hypervisor. (CVE-2010-4238, Moderate)
* CVE-2010-4243: Denial of service due to wrong execve memory accounting.
A flaw was found in the Linux kernel execve() system call implementation.
A local, unprivileged user could cause large amounts of memory to be
allocated but not visible to the OOM (Out of Memory) killer, triggering a
denial of service. (CVE-2010-4243, Moderate)
* CVE-2010-4158: Kernel information leak in socket filters.
The sk_run_filter function in the kernel's socket filter implementation
did not properly clear an array on the kernel stack, resulting in
uninitialized kernel stack memory being copied to user space.
* CVE-2010-4526: Remote denial of service vulnerability in SCTP.
A flaw was found in the sctp_icmp_proto_unreachable() function in the
Linux kernel's Stream Control Transmission Protocol (SCTP) implementation.
A remote attacker could use this flaw to cause a denial of service.
(CVE-2010-4526, Important)
* CVE-2010-4655: Information leak in ethtool_get_regs.
A missing initialization flaw was found in the ethtool_get_regs() function
in the Linux kernel's ethtool IOCTL handler. A local user who has the
CAP_NET_ADMIN capability could use this flaw to cause an information leak.
(CVE-2010-4655, Low).
* CVE-2010-4249: Local denial of service vulnerability in UNIX sockets.
A flaw was found in the Linux kernel's garbage collector for AF_UNIX
sockets. A local, unprivileged user could use this flaw to trigger a
denial of service (out-of-memory condition). (CVE-2010-4249, Moderate).
* Panic in kfree() due to race condition in acpi_bus_receive_event.
The acpi_bus_receive_event() function left the acpi_bus_event_list
unlocked between checking it was empty and extracting its first element to
pass to kfree().
* Fix connection timeouts due to shrinking tcp window with window scaling.
A problem with the IPV4 tcp window scaling code would, under certain
circumstances, incorrectly shrink the TCP window in a way that could
result in a constant flood of duplicate ACKs until the connection times
out.
SUPPORT
Ksplice support is available at support at ksplice.com or +1 765-577-5423.
More information about the VZ4.6-Updates
mailing list