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- CVEs with nessus.description==An update for kernel-alt 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-alt packages provide the Linux kernel version 4.x.
The following packages have been upgraded to a later upstream version:
kernel-alt (4.14.0). (BZ#1492717)
Security Fix(es) :
* An industry-wide issue was found in the way many modern
microprocessor designs have implemented speculative execution of
instructions (a commonly used performance optimization). There are
three primary variants of the issue which differ in the way the
speculative execution can be exploited.
Variant CVE-2017-5715 triggers the speculative execution by utilizing
branch target injection. It relies on the presence of a
precisely-defined instruction sequence in the privileged code as well
as the fact that memory accesses may cause allocation into the
microprocessor's data cache even for speculatively executed
instructions that never actually commit (retire). As a result, an
unprivileged attacker could use this flaw to cross the syscall and
guest/host boundaries and read privileged memory by conducting
targeted cache side-channel attacks. (CVE-2017-5715, Important, ARM)
Variant CVE-2017-5753 triggers the speculative execution by performing
a bounds-check bypass. It relies on the presence of a
precisely-defined instruction sequence in the privileged code as well
as the fact that memory accesses may cause allocation into the
microprocessor's data cache even for speculatively executed
instructions that never actually commit (retire). As a result, an
unprivileged attacker could use this flaw to cross the syscall
boundary and read privileged memory by conducting targeted cache
side-channel attacks. (CVE-2017-5753, Important, ARM)
Variant CVE-2017-5754 relies on the fact that, on impacted
microprocessors, during speculative execution of instruction
permission faults, exception generation triggered by a faulting access
is suppressed until the retirement of the whole instruction block. In
a combination with the fact that memory accesses may populate the
cache even when the block is being dropped and never committed
(executed), an unprivileged local attacker could use this flaw to read
privileged (kernel space) memory by conducting targeted cache
side-channel attacks. (CVE-2017-5754, Important, ARM)
* kernel: memory leak when merging buffers in SCSI IO vectors
(CVE-2017-12190, Moderate)
* kernel: net: double-free and memory corruption in get_net_ns_by_id()
(CVE-2017-15129, Moderate)
* kernel: Incorrect updates of uninstantiated keys crash the kernel
(CVE-2017-15299, Moderate)
* kernel: Missing capabilities check in
net/netfilter/nfnetlink_cthelper.c allows for unprivileged access to
systemwide nfnl_cthelper_list structure (CVE-2017-17448, Moderate)
* kernel: Missing namespace check in net/netlink/af_netlink.c allows
for network monitors to observe systemwide activity (CVE-2017-17449,
Moderate)
* kernel: Arbitrary stack overwrite causing oops via crafted signal
frame (CVE-2017-1000255, Moderate)
* kernel: Stack information leak in the EFS element (CVE-2017-1000410,
Moderate)
* kernel: Race condition in sound system can lead to denial of service
(CVE-2018-1000004, Moderate)
* kernel: Buffer overflow in mp_override_legacy_irq() (CVE-2017-11473,
Low)
* kernel: Integer overflow in futex.c:futux_requeue can lead to denial
of service or unspecified impact (CVE-2018-6927, Low)
For more details about the security issue(s), including the impact, a
CVSS score, and other related information, refer to the CVE page(s)
listed in the References section.
Red Hat would like to thank Google Project Zero for reporting
CVE-2017-5715, CVE-2017-5753, and CVE-2017-5754; Vitaly Mayatskih for
reporting CVE-2017-12190; Kirill Tkhai for reporting CVE-2017-15129;
Michael Ellerman, Gustavo Romero, Breno Leitao, Paul Mackerras, and
Cyril Bur for reporting CVE-2017-1000255; and Armis Labs for reporting
CVE-2017-1000410.
Additional Changes :
See the Red Hat Enterprise Linux 7.5 Release Notes linked from
References.
Max CVSS | 0 |
Min CVSS | 0 |
Total Count | 2 |
| ID | CVSS | Summary | Last (major) update | Published |
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