| Descripción: | Summary:
The remote host is missing an update for the 'kernel-tmb' package(s) announced via the MGASA-2015-0219 advisory.
Vulnerability Insight:
This kernel-tmb update is based on upstream -longterm 3.14.41 and fixes
the following security issues:
It was found that the Linux kernel's Infiniband subsystem did not properly
sanitize input parameters while registering memory regions from user space
via the (u)verbs API. A local user with access to a /dev/infiniband/uverbsX
device could use this flaw to crash the system or, potentially, escalate
their privileges on the system (CVE-2014-8159)
net/netfilter/nf_conntrack_proto_generic.c in the Linux kernel before
3.18 generates incorrect conntrack entries during handling of certain
iptables rule sets for the SCTP, DCCP, GRE, and UDP-Lite protocols,
which allows remote attackers to bypass intended access restrictions
via packets with disallowed port numbers (CVE-2014-8160).
The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel
before 3.18.5, when the guest OS lacks SYSENTER MSR initialization,
allows guest OS users to gain guest OS privileges or cause a denial of
service (guest OS crash) by triggering use of a 16-bit code segment for
emulation of a SYSENTER instruction (CVE-2015-0239).
The stack randomization feature in the Linux kernel before 3.19.1 on 64-bit
platforms uses incorrect data types for the results of bitwise left-shift
operations, which makes it easier for attackers to bypass the ASLR
protection mechanism by predicting the address of the top of the stack,
related to the randomize_stack_top function in fs/binfmt_elf.c and the
stack_maxrandom_size function in arch/x86/mm/mmap.c (CVE-2015-1593)
Xen 3.3.x through 4.5.x and the Linux kernel through 3.19.1 do not properly
restrict access to PCI command registers, which might allow local guest
users to cause a denial of service (non-maskable interrupt and host crash)
by disabling the (1) memory or (2) I/O decoding for a PCI Express device
and then accessing the device, which triggers an Unsupported Request
(UR) response (CVE-2015-2150)
Sasha Levin discovered that the LLC subsystem exposed some variables as
sysctls with the wrong type. On a 64-bit kernel, this possibly allows
privilege escalation from a process with CAP_NET_ADMIN capability, it
also results in a trivial information leak (CVE-2015-2041).
Sasha Levin discovered that the RDS subsystem exposed some variables as
sysctls with the wrong type. On a 64-bit kernel, this results in a
trivial information leak (CVE-2015-2042).
Andrew Lutomirski discovered that when a 64-bit task on an amd64 kernel
makes a fork(2) or clone(2) system call using int $0x80, the 32-bit
compatibility flag is set (correctly) but is not cleared on return.
As a result, both seccomp and audit will misinterpret the following
system call by the task(s), possibly leading to a violation of security
policy (CVE-2015-2830).
Stephan Mueller discovered that the optimised implementation of RFC4106
GCM for x86 processors that support AESNI miscalculated buffer addresses
in ... [Please see the references for more information on the vulnerabilities]
Affected Software/OS:
'kernel-tmb' package(s) on Mageia 4.
Solution:
Please install the updated package(s).
CVSS Score:
9.3
CVSS Vector:
AV:N/AC:M/Au:N/C:C/I:C/A:C
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