Scientific Linux SL6: SLSA-2017:0817-1 Moderate: Kernel Security Fix

Date: Wed, 5 Apr 2017 15:07:45 -0000
Reply-To: scientific-linux-users@
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Subject: Security ERRATA Moderate: kernel on SL6.x i386/x86_64
MIME-Version: 1.0
Message-ID: <20170405150745.5355.86041@slpackages.fnal.gov>

Synopsis: Moderate: kernel security, bug fix, and enhancement update
Advisory ID: SLSA-2017:0817-1
Issue Date: 2017-03-21
CVE Numbers: CVE-2016-2069
 CVE-2016-2384
 CVE-2016-6480
 CVE-2016-7097
 CVE-2016-7042
 CVE-2016-9576
 CVE-2016-8399
 CVE-2016-10088
 CVE-2016-10142
--

Security Fix(es):

* It was discovered that a remote attacker could leverage the generation
of IPv6 atomic fragments to trigger the use of fragmentation in an
arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets
is not needed) and could subsequently perform any type of a fragmentation-
based attack against legacy IPv6 nodes that do not implement RFC6946.
(CVE-2016-10142, Moderate)

* A flaw was discovered in the way the Linux kernel dealt with paging
structures. When the kernel invalidated a paging structure that was not in
use locally, it could, in principle, race against another CPU that is
switching to a process that uses the paging structure in question. A local
user could use a thread running with a stale cached virtual->physical
translation to potentially escalate their privileges if the translation in
question were writable and the physical page got reused for something
critical (for example, a page table). (CVE-2016-2069, Moderate)

* A race condition flaw was found in the ioctl_send_fib() function in the
Linux kernel's aacraid implementation. A local attacker could use this
flaw to cause a denial of service (out-of-bounds access or system crash)
by changing a certain size value. (CVE-2016-6480, Moderate)

* It was found that when the gcc stack protector was enabled, reading the
/proc/keys file could cause a panic in the Linux kernel due to stack
corruption. This happened because an incorrect buffer size was used to
hold a 64-bit timeout value rendered as weeks. (CVE-2016-7042, Moderate)

* It was found that when file permissions were modified via chmod and the
user modifying them was not in the owning group or capable of CAP_FSETID,
the setgid bit would be cleared. Setting a POSIX ACL via setxattr sets the
file permissions as well as the new ACL, but doesn't clear the setgid bit
in a similar way. This could allow a local user to gain group privileges
via certain setgid applications. (CVE-2016-7097, Moderate)

* A flaw was found in the Linux networking subsystem where a local
attacker with CAP_NET_ADMIN capabilities could cause an out-of-bounds
memory access by creating a smaller-than-expected ICMP header and sending
to its destination via sendto(). (CVE-2016-8399, Moderate)

* It was found that the blk_rq_map_user_iov() function in the Linux
kernel's block device implementation did not properly restrict the type of
iterator, which could allow a local attacker to read or write to arbitrary
kernel memory locations or cause a denial of service (use-after-free) by
leveraging write access to a /dev/sg device. (CVE-2016-9576,
CVE-2016-10088, Moderate)

* A flaw was found in the USB-MIDI Linux kernel driver: a double-free
error could be triggered for the 'umidi' object. An attacker with physical
access to the system could use this flaw to escalate their privileges.
(CVE-2016-2384, Low)
--

SL6
 x86_64
 kernel-2.6.32-696.el6.x86_64.rpm
 kernel-debug-2.6.32-696.el6.x86_64.rpm
 kernel-debug-debuginfo-2.6.32-696.el6.i686.rpm
 kernel-debug-debuginfo-2.6.32-696.el6.x86_64.rpm
 kernel-debug-devel-2.6.32-696.el6.i686.rpm
 kernel-debug-devel-2.6.32-696.el6.x86_64.rpm
 kernel-debuginfo-2.6.32-696.el6.i686.rpm
 kernel-debuginfo-2.6.32-696.el6.x86_64.rpm
 kernel-debuginfo-common-i686-2.6.32-696.el6.i686.rpm
 kernel-debuginfo-common-x86_64-2.6.32-696.el6.x86_64.rpm
 kernel-devel-2.6.32-696.el6.x86_64.rpm
 kernel-headers-2.6.32-696.el6.x86_64.rpm
 perf-2.6.32-696.el6.x86_64.rpm
 perf-debuginfo-2.6.32-696.el6.i686.rpm
 perf-debuginfo-2.6.32-696.el6.x86_64.rpm
 python-perf-debuginfo-2.6.32-696.el6.i686.rpm
 python-perf-debuginfo-2.6.32-696.el6.x86_64.rpm
 python-perf-2.6.32-696.el6.x86_64.rpm
 i386
 kernel-2.6.32-696.el6.i686.rpm
 kernel-debug-2.6.32-696.el6.i686.rpm
 kernel-debug-debuginfo-2.6.32-696.el6.i686.rpm
 kernel-debug-devel-2.6.32-696.el6.i686.rpm
 kernel-debuginfo-2.6.32-696.el6.i686.rpm
 kernel-debuginfo-common-i686-2.6.32-696.el6.i686.rpm
 kernel-devel-2.6.32-696.el6.i686.rpm
 kernel-headers-2.6.32-696.el6.i686.rpm
 perf-2.6.32-696.el6.i686.rpm
 perf-debuginfo-2.6.32-696.el6.i686.rpm
 python-perf-debuginfo-2.6.32-696.el6.i686.rpm
 python-perf-2.6.32-696.el6.i686.rpm
 noarch
 kernel-abi-whitelists-2.6.32-696.el6.noarch.rpm
 kernel-doc-2.6.32-696.el6.noarch.rpm
 kernel-firmware-2.6.32-696.el6.noarch.rpm

- Scientific Linux Development Team