Scientific Linux Security Update : kernel on SL6.x i386/x86_64

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

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

Description :

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)

See also :

http://www.nessus.org/u?3af2bf89

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.6
(CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C)
Public Exploit Available : true

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 99218 ()

Bugtraq ID:

CVE ID: CVE-2016-10088
CVE-2016-10142
CVE-2016-2069
CVE-2016-2384
CVE-2016-6480
CVE-2016-7042
CVE-2016-7097
CVE-2016-8399
CVE-2016-9576

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