Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2011-2033)

This script is Copyright (C) 2013 Tenable Network Security, Inc.


Synopsis :

The remote Oracle Linux host is missing one or more security updates.

Description :

Description of changes:

* CVE-2011-1161: Information leak in transmission logic of TPM driver.

A missing buffer size check in tpm_transmit could allow leaking of
potentially sensitive kernel memory.

* CVE-2011-1162: Information leak in TPM driver.

A flaw in the way memory containing security-related data was handled
in tpm_read() could allow a local, unprivileged user to read the
results of a previously run TPM command. (CVE-2011-1162, Low)

* CVE-2011-2494: Information leak in task/process statistics.

The I/O statistics from the taskstats subsystem could be read without
any restrictions. A local, unprivileged user could use this flaw to
gather confidential information, such as the length of a password used
in a process. (CVE-2011-2494, Low)

* CVE-2011-3188: Weak TCP sequence number generation.

The way IPv4 and IPv6 protocol sequence numbers and fragment IDs were
generated could allow a man-in-the-middle attacker to inject packets
and possibly hijack connections. Protocol sequence numbers and
fragment IDs are now more random. (CVE-2011-3188, Moderate)

* CVE-2011-1577: Missing boundary checks in GPT partition handling.

A heap overflow flaw in the Linux kernel's EFI GUID Partition Table
(GPT) implementation could allow a local attacker to cause a denial
of service by mounting a disk that contains specially-crafted
partition tables. (CVE-2011-1577, Low)

* CVE-2011-3191: Memory corruption in CIFS.

A malicious CIFS server could overflow a signed integer value, causing a
memcpy() to scribble over a large amount of memory.

* CVE-2011-3353: Denial of service in FUSE via FUSE_NOTIFY_INVAL_ENTRY.

A buffer overflow flaw was found in the Linux kernel's FUSE
(Filesystem in Userspace) implementation. A local user in the fuse
group who has access to mount a FUSE file system could use this flaw
to cause a denial of service. (CVE-2011-3353, Moderate)

* CVE-2011-4326: Denial of service in IPv6 UDP Fragmentation Offload.

A flaw was found in the way the Linux kernel handled fragmented IPv6
UDP datagrams over the bridge with UDP Fragmentation Offload (UFO)
functionality on. A remote attacker could use this flaw to cause a
denial of service. (CVE-2011-4326, Important)

* CVE-2011-3593: Denial of service in VLAN with priority tagged frames.

A flaw was found in the way the Linux kernel handled VLAN 0 frames
with the priority tag set. When using certain network drivers, an
attacker on the local network could use this flaw to cause a denial of
service. (CVE-2011-3593, Moderate)

* CVE-2011-2699: Predictable IPv6 fragment identification numbers.

IPv6 fragment identification value generation could allow a remote
attacker to disrupt a target system's networking, preventing
legitimate users from accessing its services. (CVE-2011-2699,
Important)

kernel-uek:

[2.6.32-200.23.1.el6uek]
- net: Remove atmclip.h to prevent break kabi check.
- KConfig: add CONFIG_UEK5=n to ol6/config-generic

[2.6.32-200.22.1.el6uek]
- ipv6: make fragment identifications less predictable (Joe Jin)
{CVE-2011-2699}
- vlan: fix panic when handling priority tagged frames (Joe Jin)
{CVE-2011-3593}
- ipv6: udp: fix the wrong headroom check (Maxim Uvarov) {CVE-2011-4326}
- b43: allocate receive buffers big enough for max frame len + offset
(Maxim Uvarov) {CVE-2011-3359}
- fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message (Maxim Uvarov)
{CVE-2011-3353}
- cifs: fix possible memory corruption in CIFSFindNext (Maxim Uvarov)
{CVE-2011-3191}
- crypto: md5 - Add export support (Maxim Uvarov) {CVE-2011-2699}
- fs/partitions/efi.c: corrupted GUID partition tables can cause kernel
oops (Maxim Uvarov) {CVE-2011-1577}
- block: use struct parsed_partitions *state universally in partition
check code (Maxim Uvarov)
- net: Compute protocol sequence numbers and fragment IDs using MD5.
(Maxim Uvarov) {CVE-2011-3188}
- crypto: Move md5_transform to lib/md5.c (Maxim Uvarov) {CVE-2011-3188}
- perf tools: do not look at ./config for configuration (Maxim Uvarov)
{CVE-2011-2905}
- Make TASKSTATS require root access (Maxim Uvarov) {CVE-2011-2494}
- TPM: Zero buffer after copying to userspace (Maxim Uvarov) {CVE-2011-1162}
- TPM: Call tpm_transmit with correct size (Maxim Uvarov){CVE-2011-1161}
- fnic: fix panic while booting in fnic(Xiaowei Hu)
- Revert 'PCI hotplug: acpiphp: set current_state to D0 in
register_slot' (Guru Anbalagane)
- xen: drop xen_sched_clock in favour of using plain wallclock time
(Jeremy Fitzhardinge)

[2.6.32-200.21.1.el6uek]
- PCI: Set device power state to PCI_D0 for device without native PM support
(Ajaykumar Hotchandani) [orabug 13033435]

See also :

https://oss.oracle.com/pipermail/el-errata/2011-November/002478.html
https://oss.oracle.com/pipermail/el-errata/2011-November/002477.html

Solution :

Update the affected unbreakable enterprise kernel packages.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)