Synopsis
The remote Red Hat host is missing one or more security updates.
Description
An update for kernel is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es) :
* A flaw named FragmentSmack was found in the way the Linux kernel
handled reassembly of fragmented IPv4 and IPv6 packets. A remote
attacker could use this flaw to trigger time and calculation expensive
fragment reassembly algorithm by sending specially crafted packets
which could lead to a CPU saturation and hence a denial of service on
the system. (CVE-2018-5391)
* kernel: out-of-bounds access in the show_timer function in
kernel/time/ posix-timers.c (CVE-2017-18344)
* kernel: Integer overflow in udl_fb_mmap() can allow attackers to
execute code in kernel space (CVE-2018-8781)
* kernel: MIDI driver race condition leads to a double-free
(CVE-2018-10902)
* kernel: Missing check in inode_init_owner() does not clear SGID bit
on non-directories for non-members (CVE-2018-13405)
* kernel: AIO write triggers integer overflow in some protocols
(CVE-2015-8830)
* kernel: Use-after-free in snd_pcm_info function in ALSA subsystem
potentially leads to privilege escalation (CVE-2017-0861)
* kernel: Handling of might_cancel queueing is not properly pretected
against race (CVE-2017-10661)
* kernel: Salsa20 encryption algorithm does not correctly handle
zero-length inputs allowing local attackers to cause denial of service
(CVE-2017-17805)
* kernel: Inifinite loop vulnerability in madvise_willneed() function
allows local denial of service (CVE-2017-18208)
* kernel: fuse-backed file mmap-ed onto process cmdline arguments
causes denial of service (CVE-2018-1120)
* kernel: a NULL pointer dereference in dccp_write_xmit() leads to a
system crash (CVE-2018-1130)
* kernel: drivers/block/loop.c mishandles lo_release serialization
allowing denial of service (CVE-2018-5344)
* kernel: Missing length check of payload in _sctp_make_chunk()
function allows denial of service (CVE-2018-5803)
* kernel: buffer overflow in drivers/net/wireless/ath/wil6210/
wmi.c:wmi_set_ie() may lead to memory corruption (CVE-2018-5848)
* kernel: out-of-bound write in ext4_init_block_bitmap function with a
crafted ext4 image (CVE-2018-10878)
* kernel: Improper validation in bnx2x network card driver can allow
for denial of service attacks via crafted packet (CVE-2018-1000026)
* kernel: Information leak when handling NM entries containing NUL
(CVE-2016-4913)
* kernel: Mishandling mutex within libsas allowing local Denial of
Service (CVE-2017-18232)
* kernel: NULL pointer dereference in ext4_process_freed_data() when
mounting crafted ext4 image (CVE-2018-1092)
* kernel: NULL pointer dereference in ext4_xattr_inode_hash() causes
crash with crafted ext4 image (CVE-2018-1094)
* kernel: vhost: Information disclosure in
vhost/vhost.c:vhost_new_msg() (CVE-2018-1118)
* kernel: Denial of service in resv_map_release function in
mm/hugetlb.c (CVE-2018-7740)
* kernel: Memory leak in the sas_smp_get_phy_events function in
drivers/scsi/ libsas/sas_expander.c (CVE-2018-7757)
* kernel: Invalid pointer dereference in xfs_ilock_attr_map_shared()
when mounting crafted xfs image allowing denial of service
(CVE-2018-10322)
* kernel: use-after-free detected in ext4_xattr_set_entry with a
crafted file (CVE-2018-10879)
* kernel: out-of-bound access in ext4_get_group_info() when mounting
and operating a crafted ext4 image (CVE-2018-10881)
* kernel: stack-out-of-bounds write in jbd2_journal_dirty_metadata
function (CVE-2018-10883)
* kernel: incorrect memory bounds check in drivers/cdrom/cdrom.c
(CVE-2018-10940)
Red Hat would like to thank Juha-Matti Tilli (Aalto University -
Department of Communications and Networking and Nokia Bell Labs) for
reporting CVE-2018-5391; Trend Micro Zero Day Initiative for reporting
CVE-2018-10902; Qualys Research Labs for reporting CVE-2018-1120;
Evgenii Shatokhin (Virtuozzo Team) for reporting CVE-2018-1130; and
Wen Xu for reporting CVE-2018-1092 and CVE-2018-1094.
Solution
Update the affected packages.