Issued:
2018-05-08
Updated:
2018-05-08

RHSA-2018:1355 - Important: kernel-rt security and bug fix update

Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory Important

Topic

An update for kernel-rt 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.

Description

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

  • Kernel: KVM: error in exception handling leads to wrong debug stack value (CVE-2018-1087)

  • Kernel: error in exception handling leads to DoS (CVE-2018-8897)

  • Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation (CVE-2017-16939)

  • kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c (CVE-2018-1068)

  • kernel: ptrace() incorrect error handling leads to corruption and DoS (CVE-2018-1000199)

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 Andy Lutomirski for reporting CVE-2018-1087 and CVE-2018-1000199 and Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting CVE-2018-8897.

Bug Fix(es):

  • The kernel-rt packages have been upgraded to the 3.10.0-862.2.3 source tree, which provides a number of bug fixes over the previous version. (BZ#1549768)

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.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Real Time7x86_64
Red Hat Enterprise Linux for Real Time for x86_64 - Extended Life Cycle Support7x86_64
Red Hat Enterprise Linux for Real Time for NFV7x86_64

Updated Packages

  • kernel-rt-debug-debuginfo-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-debug-kvm-debuginfo-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-3.10.0-862.2.3.rt56.806.el7.src.rpm
  • kernel-rt-debug-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-doc-3.10.0-862.2.3.rt56.806.el7.noarch.rpm
  • kernel-rt-debug-kvm-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-kvm-debuginfo-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-debug-devel-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-trace-kvm-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-trace-kvm-debuginfo-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-trace-devel-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-debuginfo-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-trace-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-kvm-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-trace-debuginfo-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-devel-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
  • kernel-rt-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm

Fixes

CVEs

References

Additional information