SuSE: 2009-031: Linux kernel Security Update
Summary
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SUSE Security Announcement
Package: kernel
Announcement ID: SUSE-SA:2009:031
Date: Mon, 09 Jun 2009 09:00:00 +0000
Affected Products: openSUSE 11.0
Vulnerability Type: remote code execution
Severity (1-10): 9
SUSE Default Package: yes
Cross-References: CVE-2009-0028, CVE-2009-0065, CVE-2009-0269
CVE-2009-0322, CVE-2009-0675, CVE-2009-0676
CVE-2009-0834, CVE-2009-0835, CVE-2009-0859
CVE-2009-1072, CVE-2009-1242, CVE-2009-1265
CVE-2009-1337, CVE-2009-1439, CVE-2009-1630
CVE-2009-1961
Content of This Advisory:
1) Security Vulnerability Resolved:
Linux kernel security problem
Problem Description
2) Solution or Work-Around
3) Special Instructions and Notes
4) Package Location and Checksums
5) Pending Vulnerabilities, Solutions, and Work-Arounds:
See SUSE Security Summary Report.
6) Authenticity Verification and Additional Information
______________________________________________________________________________
1) Problem Description and Brief Discussion
This kernel update for openSUSE 11.0 fixes some bugs and several
security problems.
The following security issues are fixed:
CVE-2009-0065: Buffer overflow in net/sctp/sm_statefuns.c in the
Stream Control Transmission Protocol (sctp) implementation in the
Linux kernel allows remote attackers to remotely execute code via an
FWD-TSN (aka FORWARD-TSN) chunk with a large stream ID.
CVE-2009-1961: A local denial of service problem in the splice(2)
system call.
CVE-2009-1630: The nfs_permission function in fs/nfs/dir.c in the
NFS client implementation in the Linux kernel when atomic_open is
available, does not check execute (aka EXEC or MAY_EXEC) permission
bits, which allows local users to bypass permissions and execute files,
as demonstrated by files on an NFSv4 file server.
CVE-2009-0834: The audit_syscall_entry function in the Linux kernel
on the x86_64 platform did not properly handle (1) a 32-bit process
making a 64-bit syscall or (2) a 64-bit process making a 32-bit
syscall, which allows local users to bypass certain syscall audit
configurations via crafted syscalls.
CVE-2009-1072: nfsd in the Linux kernel did not drop the CAP_MKNOD
capability before handling a user request in a thread, which allows
local users to create device nodes, as demonstrated on a filesystem
that has been exported with the root_squash option.
CVE-2009-0835 The __secure_computing function in kernel/seccomp.c
in the seccomp subsystem in the Linux kernel on the x86_64 platform,
when CONFIG_SECCOMP is enabled, does not properly handle (1) a 32-bit
process making a 64-bit syscall or (2) a 64-bit process making a
32-bit syscall, which allows local users to bypass intended access
restrictions via crafted syscalls that are misinterpreted as (a)
stat or (b) chmod.
CVE-2009-1439: Buffer overflow in fs/cifs/connect.c in CIFS in the
Linux kernel 2.6.29 and earlier allows remote attackers to cause
a denial of service (crash) or potential code execution via a long
nativeFileSystem field in a Tree Connect response to an SMB mount
request.
This requires that kernel can be made to mount a "cifs" filesystem
from a malicious CIFS server.
CVE-2009-1337: The exit_notify function in kernel/exit.c in the Linux
kernel did not restrict exit signals when the CAP_KILL capability
is held, which allows local users to send an arbitrary signal to a
process by running a program that modifies the exit_signal field and
then uses an exec system call to launch a setuid application.
CVE-2009-0859: The shm_get_stat function in ipc/shm.c in the shm
subsystem in the Linux kernel, when CONFIG_SHMEM is disabled,
misinterprets the data type of an inode, which allows local users to cause a denial of service (system hang) via an SHM_INFO shmctl
call, as demonstrated by running the ipcs program. (SUSE is enabling
CONFIG_SHMEM, so is by default not affected, the fix is just for
completeness).
CVE-2009-1242: The vmx_set_msr function in arch/x86/kvm/vmx.c in
the VMX implementation in the KVM subsystem in the Linux kernel on
the i386 platform allows guest OS users to cause a denial of service
(OOPS) by setting the EFER_LME (aka "Long mode enable") bit in the
Extended Feature Enable Register (EFER) model-specific register,
which is specific to the x86_64 platform.
CVE-2009-1265: Integer overflow in rose_sendmsg (sys/net/af_rose.c) in
the Linux kernel might allow attackers to obtain sensitive information
via a large length value, which causes "garbage" memory to be sent.
CVE-2009-0028: The clone system call in the Linux kernel allows
local users to send arbitrary signals to a parent process from an
unprivileged child process by launching an additional child process
with the CLONE_PARENT flag, and then letting this new process exit.
CVE-2009-0675: The skfp_ioctl function in drivers/net/skfp/skfddi.c
in the Linux kernel permits SKFP_CLR_STATS requests only when the
CAP_NET_ADMIN capability is absent, instead of when this capability
is present, which allows local users to reset the driver statistics,
related to an "inverted logic" issue.
CVE-2009-0676: The sock_getsockopt function in net/core/sock.c in
the Linux kernel does not initialize a certain structure member,
which allows local users to obtain potentially sensitive information
from kernel memory via an SO_BSDCOMPAT getsockopt request.
CVE-2009-0322: drivers/firmware/dell_rbu.c in the Linux kernel allows
local users to cause a denial of service (system crash) via a read
system call that specifies zero bytes from the (1) image_type or (2)
packet_size file in /sys/devices/platform/dell_rbu/.
CVE-2009-0269: fs/ecryptfs/inode.c in the eCryptfs subsystem in the
Linux kernel allows local users to cause a denial of service (fault
or memory corruption), or possibly have unspecified other impact,
via a readlink call that results in an error, leading to use of a -1
return value as an array index.
Some other non-security bugs were fixed, please see the RPM changelog.
2) Solution or Work-Around
There is no known workaround, please install the update packages.
3) Special Instructions and Notes
Please reboot the machine after installing the update.
4) Package Location and Checksums
The preferred method for installing security updates is to use the YaST
Online Update (YOU) tool. YOU detects which updates are required and
automatically performs the necessary steps to verify and install them.
Alternatively, download the update packages for your distribution manually
and verify their integrity by the methods listed in Section 6 of this
announcement. Then install the packages using the command
rpm -Fhv
References
