rhsa-2012_0333
Vulnerability from csaf_redhat
Published
2012-02-23 20:18
Modified
2024-11-22 05:59
Summary
Red Hat Security Advisory: kernel-rt security and bug fix update
Notes
Topic
Updated kernel-rt packages that fix multiple security issues and various
bugs are now available for Red Hat Enterprise MRG 2.1.
The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.
Details
These packages contain the Linux kernel.
Security fixes:
* SG_IO ioctl SCSI requests on partitions or LVM volumes could be passed to
the underlying block device, allowing a privileged user to bypass
restrictions and gain read and write access (and be able to issue other
SCSI commands) to the entire block device. (CVE-2011-4127, Important)
* A local, unprivileged user could use an integer overflow flaw in
drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their
privileges. (CVE-2012-0044, Important)
* A local, unprivileged user could use a flaw in the Performance Events
implementation to cause a denial of service. (CVE-2011-2918, Moderate)
* A local, unprivileged user could use flaws in the XFS file system
implementation to cause a denial of service or escalate their privileges by
mounting a specially-crafted disk. (CVE-2011-4077, CVE-2012-0038, Moderate)
* A local, unprivileged user could use a flaw in the Out of Memory (OOM)
killer to monopolize memory, have their process skipped by the OOM killer,
or cause other tasks to be terminated. (CVE-2011-4097, Moderate)
* A local, unprivileged user could use a flaw in the key management
facility to cause a denial of service. (CVE-2011-4110, Moderate)
* A malicious Network File System version 4 (NFSv4) server could return a
crafted reply to a GETACL request, causing a denial of service on the
client. (CVE-2011-4131, Moderate)
* A local attacker could use a flaw in the Journaling Block Device (JBD) to
crash the system by mounting a specially-crafted ext3 or ext4 disk.
(CVE-2011-4132, Moderate)
* A flaw in igmp_heard_query() could allow an attacker, who is able to send
certain IGMP (Internet Group Management Protocol) packets to a target
system, to cause a denial of service. (CVE-2012-0207, Moderate)
* If lock contention during signal sending occurred when in a software
interrupt handler that is using the per-CPU debug stack, the task could be
scheduled out on the realtime kernel, possibly leading to debug stack
corruption. A local, unprivileged user could use this flaw to cause a
denial of service. (CVE-2012-0810, Moderate)
Red Hat would like to thank Chen Haogang for reporting CVE-2012-0044;
Wang Xi for reporting CVE-2012-0038; Shubham Goyal for reporting
CVE-2011-4097; Andy Adamson for reporting CVE-2011-4131; and Simon McVittie
for reporting CVE-2012-0207.
Bug fixes:
* When a sleeping task, waiting on a futex (fast userspace mutex), tried to
get the spin_lock(hb->lock) RT-mutex, if the owner of the futex released
the lock, the sleeping task was put on a futex proxy lock. Consequently,
the sleeping task was blocked on two locks and eventually terminated in the
BUG_ON() function. With this update, the WAKEUP_INPROGRESS pseudo-lock has
been added to be used as a proxy lock. This pseudo-lock tells the sleeping
task that it is being woken up so that the task no longer tries to get the
second lock. Now, the futex code works as expected and sleeping tasks no
longer crash in the described scenario. (BZ#784733)
* When the CONFIG_CRYPTO_FIPS configuration option was disabled, some
services such as sshd and ipsec, while working properly, returned warning
messages regarding this missing option during start up. With this update,
CONFIG_CRYPTO_FIPS has been enabled and no warning messages are now
returned in the described scenario. (BZ#786145)
* Previously, when a read operation on a loop device failed, the data
successfully read from the device was not cleared and could eventually
leak. This bug has been fixed and all data are now properly cleared in the
described scenario. (BZ#761420)
* Due to an assembler-sourced object, the perf utility (from the perf-rt
package) for AMD64 and Intel 64 architectures contained an executable
stack. This update adds the ".note.GNU-stack" section definition to the
bench/mem-memcpy-x86-64-asm.S component of perf, with all flags disabled,
and perf no longer contains an executable stack, thus fixing this bug.
(BZ#783570)
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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{
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"title": "Statement"
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{
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},
{
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{
"names": [
"Simon McVittie"
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}
],
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"ids": [
{
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},
{
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"title": "kernel: igmp: Avoid zero delay when receiving odd mixture of IGMP queries"
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{
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"discovery_date": "2012-01-25T00:00:00+00:00",
"ids": [
{
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{
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},
{
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},
{
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]
}
Loading...
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.