RedHat: RHSA-2018-2172:01 Important: kernel security update
Summary
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of Load & Store instructions
(a commonly used performance optimization). It relies on the presence of a
precisely-defined instruction sequence in the privileged code as well as
the fact that memory read from address to which a recent memory write has
occurred may see an older value and subsequently cause an update 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 read privileged memory by conducting targeted cache
side-channel attacks. (CVE-2018-3639)
* kernel: A divide-by-zero vulnerability was found in the
__tcp_select_window function in the Linux kernel. This can result in a
kernel panic causing a local denial of service. (CVE-2017-14106)
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 Ken Johnson (Microsoft Security Response
Center) and Jann Horn (Google Project Zero) for reporting CVE-2018-3639.
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
References
https://access.redhat.com/security/cve/CVE-2017-14106 https://access.redhat.com/security/cve/CVE-2018-3639 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/ssbd
Package List
Red Hat Enterprise Linux Server (v. 5 ELS):
Source:
kernel-2.6.18-433.el5.src.rpm
i386:
kernel-2.6.18-433.el5.i686.rpm
kernel-PAE-2.6.18-433.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-433.el5.i686.rpm
kernel-PAE-devel-2.6.18-433.el5.i686.rpm
kernel-debug-2.6.18-433.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-433.el5.i686.rpm
kernel-debug-devel-2.6.18-433.el5.i686.rpm
kernel-debuginfo-2.6.18-433.el5.i686.rpm
kernel-debuginfo-common-2.6.18-433.el5.i686.rpm
kernel-devel-2.6.18-433.el5.i686.rpm
kernel-headers-2.6.18-433.el5.i386.rpm
kernel-xen-2.6.18-433.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-433.el5.i686.rpm
kernel-xen-devel-2.6.18-433.el5.i686.rpm
noarch:
kernel-doc-2.6.18-433.el5.noarch.rpm
s390x:
kernel-2.6.18-433.el5.s390x.rpm
kernel-debug-2.6.18-433.el5.s390x.rpm
kernel-debug-debuginfo-2.6.18-433.el5.s390x.rpm
kernel-debug-devel-2.6.18-433.el5.s390x.rpm
kernel-debuginfo-2.6.18-433.el5.s390x.rpm
kernel-debuginfo-common-2.6.18-433.el5.s390x.rpm
kernel-devel-2.6.18-433.el5.s390x.rpm
kernel-headers-2.6.18-433.el5.s390x.rpm
kernel-kdump-2.6.18-433.el5.s390x.rpm
kernel-kdump-debuginfo-2.6.18-433.el5.s390x.rpm
kernel-kdump-devel-2.6.18-433.el5.s390x.rpm
x86_64:
kernel-2.6.18-433.el5.x86_64.rpm
kernel-debug-2.6.18-433.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-433.el5.x86_64.rpm
kernel-debug-devel-2.6.18-433.el5.x86_64.rpm
kernel-debuginfo-2.6.18-433.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-433.el5.x86_64.rpm
kernel-devel-2.6.18-433.el5.x86_64.rpm
kernel-headers-2.6.18-433.el5.x86_64.rpm
kernel-xen-2.6.18-433.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-433.el5.x86_64.rpm
kernel-xen-devel-2.6.18-433.el5.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for kernel is now available for Red Hat Enterprise Linux 5Extended Lifecycle Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Server (v. 5 ELS) - i386, noarch, s390x, x86_64
Bugs Fixed
1487295 - CVE-2017-14106 kernel: Divide-by-zero in __tcp_select_window
1566890 - CVE-2018-3639 hw: cpu: speculative store bypass