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______________________________________________________________________________
SUSE Security Announcement
Package: kernel
Announcement ID: SUSE-SA:2010:046
Date: Thu, 23 Sep 2010 15:00:00 +0000
Affected Products: openSUSE 11.2
Vulnerability Type: local privilege escalation
CVSS v2 Base Score: 7.2 (AV:L/AC:L/Au:N/C:C/I:C/A:C)
SUSE Default Package: yes
Cross-References: CVE-2009-1389, CVE-2009-4537, CVE-2010-1087
CVE-2010-1146, CVE-2010-1148, CVE-2010-1162
CVE-2010-1437, CVE-2010-1636, CVE-2010-1641
CVE-2010-2066, CVE-2010-2071, CVE-2010-2226
CVE-2010-2248, CVE-2010-2478, CVE-2010-2492
CVE-2010-2495, CVE-2010-2521, CVE-2010-2524
CVE-2010-2537, CVE-2010-2538, CVE-2010-2798
CVE-2010-2803, CVE-2010-2942, CVE-2010-2946
CVE-2010-2954, CVE-2010-2955, CVE-2010-2959
CVE-2010-2960, CVE-2010-3015, CVE-2010-3078
CVE-2010-3079, CVE-2010-3080, CVE-2010-3081
CVE-2010-3084, CVE-2010-3296, CVE-2010-3297
CVE-2010-3298, CVE-2010-3301
Content of This Advisory:
1) Security Vulnerability Resolved:
Linux kernel security update
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 openSUSE 11.2 kernel was updated to 2.6.31.14, fixing several
security issues and bugs.
A lot of ext4 filesystem stability fixes were also added.
Following security issues have been fixed:
CVE-2010-3301: Mismatch between 32bit and 64bit register usage in the
system call entry path could be used by local attackers to gain root
privileges. This problem only affects x86_64 kernels.
CVE-2010-3081: Incorrect buffer handling in the biarch-compat buffer
handling could be used by local attackers to gain root privileges. This
problem affects foremost x86_64, or potentially other biarch platforms,
like PowerPC and S390x.
CVE-2010-2959: Integer overflow in net/can/bcm.c in the Controller
Area Network (CAN) implementation in the Linux kernel allowed attackers
to execute arbitrary code or cause a denial of service (system crash)
via crafted CAN traffic.
CVE-2010-3084: A buffer overflow in the ETHTOOL_GRXCLSRLALL code
could be used to crash the kernel or potentially execute code.
CVE-2010-2955: A kernel information leak via the WEXT ioctl was fixed.
CVE-2010-2960: The keyctl_session_to_parent function in
security/keys/keyctl.c in the Linux kernel expects that a certain
parent session keyring exists, which allowed local users to cause
a denial of service (NULL pointer dereference and system crash) or
possibly have unspecified other impact via a KEYCTL_SESSION_TO_PARENT
argument to the keyctl function.
CVE-2010-3080: A double free in an alsa error path was fixed, which
could lead to kernel crashes.
CVE-2010-3079: Fixed a ftrace NULL pointer dereference problem which
could lead to kernel crashes.
CVE-2010-3298: Fixed a kernel information leak in the net/usb/hso driver.
CVE-2010-3296: Fixed a kernel information leak in the cxgb3 driver.
CVE-2010-3297: Fixed a kernel information leak in the net/eql driver.
CVE-2010-3078: Fixed a kernel information leak in the xfs filesystem.
CVE-2010-2942: Fixed a kernel information leak in the net scheduler code.
CVE-2010-2954: The irda_bind function in net/irda/af_irda.c in the
Linux kernel did not properly handle failure of the irda_open_tsap
function, which allowed local users to cause a denial of service
(NULL pointer dereference and panic) and possibly have unspecified
other impact via multiple unsuccessful calls to bind on an AF_IRDA
(aka PF_IRDA) socket.
CVE-2010-2226: The xfs_swapext function in fs/xfs/xfs_dfrag.c in the
Linux kernel did not properly check the file descriptors passed to
the SWAPEXT ioctl, which allowed local users to leverage write access
and obtain read access by swapping one file into another file.
CVE-2010-2946: The 'os2' xattr namespace on the jfs filesystem could
be used to bypass xattr namespace rules.
CVE-2010-2959: Integer overflow in net/can/bcm.c in the Controller
Area Network (CAN) implementation in the Linux kernel allowed attackers
to execute arbitrary code or cause a denial of service (system crash)
via crafted CAN traffic.
CVE-2010-3015: Integer overflow in the ext4_ext_get_blocks function
in fs/ext4/extents.c in the Linux kernel allowed local users to cause
a denial of service (BUG and system crash) via a write operation on
the last block of a large file, followed by a sync operation.
CVE-2010-2492: Buffer overflow in the ecryptfs_uid_hash macro in
fs/ecryptfs/messaging.c in the eCryptfs subsystem in the Linux kernel
might have allowed local users to gain privileges or cause a denial
of service (system crash) via unspecified vectors.
CVE-2010-2248: fs/cifs/cifssmb.c in the CIFS implementation in the
Linux kernel allowed remote attackers to cause a denial of service
(panic) via an SMB response packet with an invalid CountHigh value,
as demonstrated by a response from an OS/2 server, related to the
CIFSSMBWrite and CIFSSMBWrite2 functions.
CVE-2010-2803: The drm_ioctl function in drivers/gpu/drm/drm_drv.c
in the Direct Rendering Manager (DRM) subsystem in the Linux kernel
allowed local users to obtain potentially sensitive information from
kernel memory by requesting a large memory-allocation amount.
CVE-2010-2478: A potential buffer overflow in the ETHTOOL_GRXCLSRLALL
ethtool code was fixed which could be used by local attackers to
crash the kernel or potentially execute code.
CVE-2010-2524: The DNS resolution functionality in the CIFS
implementation in the Linux kernel, when CONFIG_CIFS_DFS_UPCALL
is enabled, relies on a user's keyring for the dns_resolver upcall
in the cifs.upcall userspace helper, which allowed local users to
spoof the results of DNS queries and perform arbitrary CIFS mounts
via vectors involving an add_key call, related to a "cache stuffing"
issue and MS-DFS referrals.
CVE-2010-2798: The gfs2_dirent_find_space function in fs/gfs2/dir.c
in the Linux kernel used an incorrect size value in calculations
associated with sentinel directory entries, which allowed local users
to cause a denial of service (NULL pointer dereference and panic) and
possibly have unspecified other impact by renaming a file in a GFS2
filesystem, related to the gfs2_rename function in fs/gfs2/ops_inode.c.
CVE-2010-2537: The BTRFS_IOC_CLONE and BTRFS_IOC_CLONE_RANGE ioctls
allowed a local user to overwrite append-only files.
CVE-2010-2538: The BTRFS_IOC_CLONE_RANGE ioctl was subject to an
integer overflow in specifying offsets to copy from a file, which
potentially allowed a local user to read sensitive filesystem data.
CVE-2010-2521: Multiple buffer overflows in fs/nfsd/nfs4xdr.c in the
XDR implementation in the NFS server in the Linux kernel allowed
remote attackers to cause a denial of service (panic) or possibly
execute arbitrary code via a crafted NFSv4 compound WRITE request,
related to the read_buf and nfsd4_decode_compound functions.
CVE-2010-2066: The mext_check_arguments function in
fs/ext4/move_extent.c in the Linux kernel allowed local users to
overwrite an append-only file via a MOVE_EXT ioctl call that specifies
this file as a donor.
CVE-2010-2495: The pppol2tp_xmit function in drivers/net/pppol2tp.c in
the L2TP implementation in the Linux kernel did not properly validate
certain values associated with an interface, which allowed attackers
to cause a denial of service (NULL pointer dereference and OOPS)
or possibly have unspecified other impact via vectors related to a
routing change.
CVE-2010-2071: The btrfs_xattr_set_acl function in fs/btrfs/acl.c
in btrfs in the Linux kernel did not check file ownership before
setting an ACL, which allowed local users to bypass file permissions
by setting arbitrary ACLs, as demonstrated using setfacl.
CVE-2010-1641: The do_gfs2_set_flags function in fs/gfs2/file.c in the
Linux kernel did not verify the ownership of a file, which allowed
local users to bypass intended access restrictions via a SETFLAGS
ioctl request.
CVE-2010-1087: The nfs_wait_on_request function in fs/nfs/pagelist.c
in Linux kernel 2.6.x allowed attackers to cause a denial of service
(Oops) via unknown vectors related to truncating a file and an
operation that is not interruptible.
CVE-2010-1636: The btrfs_ioctl_clone function in fs/btrfs/ioctl.c
in the btrfs functionality in the Linux kernel did not ensure that a
cloned file descriptor has been opened for reading, which allowed local
users to read sensitive information from a write-only file descriptor.
CVE-2010-1437: Race condition in the find_keyring_by_name function
in security/keys/keyring.c in the Linux kernel allowed local users
to cause a denial of service (memory corruption and system crash)
or possibly have unspecified other impact via keyctl session commands
that trigger access to a dead keyring that is undergoing deletion by
the key_cleanup function.
CVE-2010-1148: The cifs_create function in fs/cifs/dir.c in the Linux
kernel allowed local users to cause a denial of service (NULL pointer
dereference and OOPS) or possibly have unspecified other impact via
a NULL nameidata (aka nd) field in a POSIX file-creation request to
a server that supports UNIX extensions.
CVE-2010-1162: The release_one_tty function in drivers/char/tty_io.c
in the Linux kernel omitted certain required calls to the put_pid
function, which has unspecified impact and local attack vectors.
CVE-2010-1146: The Linux kernel, when a ReiserFS filesystem exists,
did not restrict read or write access to the .reiserfs_priv directory,
which allowed local users to gain privileges by modifying (1)
extended attributes or (2) ACLs, as demonstrated by deleting a file
under .reiserfs_priv/xattrs/.
CVE-2009-4537: drivers/net/r8169.c in the r8169 driver in the Linux
kernel did not properly check the size of an Ethernet frame that
exceeds the MTU, which allowed remote attackers to (1) cause a denial
of service (temporary network outage) via a packet with a crafted size,
in conjunction with certain packets containing A characters and certain
packets containing E characters; or (2) cause a denial of service
(system crash) via a packet with a crafted size, in conjunction with
certain packets containing '\0' characters, related to the value
of the status register and erroneous behavior associated with the
RxMaxSize register. NOTE: this vulnerability exists because of an
incorrect fix for CVE-2009-1389.
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