Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2011-2038)

This script is Copyright (C) 2013-2014 Tenable Network Security, Inc.


Synopsis :

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

Description :

Description of changes:

* CVE-2011-4127: KVM privilege escalation through insufficient
validation in SG_IO ioctl.

Using the SG_IO IOCTL to issue SCSI requests to partitions or LVM
volumes resulted in the requests being passed to the underlying block
device. If a privileged user only had access to a single partition or
LVM volume, they could use this flaw to bypass those restrictions and
gain read and write access (and be able to issue other SCSI commands)
to the entire block device.

In KVM (Kernel-based Virtual Machine) environments using raw format
virtio disks backed by a partition or LVM volume, a privileged guest
user could bypass intended restrictions and issue read and write
requests (and other SCSI commands) on the host, and possibly access
the data of other guests that reside on the same underlying block
device. (CVE-2011-4127, Important)

* CVE-2011-1493: Insufficient validation in X.25 Rose parsing.

Dan Rosenberg discovered that the X.25 Rose network stack did not
correctly handle certain fields. If a system was running with Rose
enabled, a remote attacker could send specially crafted traffic to
gain root privileges.


* Additional fix for CVE-2011-1576: Denial of service with VLAN packets
and GRO.

Oracle's previous fix for CVE-2011-1576 did not completely address the
issue.

[2.6.32-300.4.1.el5uek]
- [pci] intel-iommu: Default to non-coherent for domains unattached to
iommus (Joe Jin)
- [dm] do not forward ioctls from logical volumes to the underlying
device (Joe Jin) {CVE-2011-4127}
- [block] fail SCSI passthrough ioctls on partition devices (Joe Jin)
{CVE-2011-4127}
- [block] add and use scsi_blk_cmd_ioctl (Joe Jin) {CVE-2011-4127}
- [net] gro: reset vlan_tci on reuse (Dan Carpenter) {CVE-2011-1576}
- [net] rose: Add length checks to CALL_REQUEST parsing (Ben Hutchings)
{CVE-2011-1493}
- [net] rose_loopback_timer sets VC number <= ROSE_DEFAULT_MAXVC
(Bernard Pidoux F6BVP) {CVE-2011-1493}

See also :

https://oss.oracle.com/pipermail/el-errata/2011-December/002533.html
https://oss.oracle.com/pipermail/el-errata/2011-December/002534.html

Solution :

Update the affected unbreakable enterprise kernel packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 6.5
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

Family: Oracle Linux Local Security Checks

Nessus Plugin ID: 68426 ()

Bugtraq ID: 46935
48907
51176

CVE ID: CVE-2011-1493
CVE-2011-1576
CVE-2011-4127