RHSA-2015:1564Medium

Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update

Published
August 5, 2015
Last Modified
November 7, 2026

🔗 CVE IDs covered (3)

CVE-2014-9715 →CVE-2015-2922 →CVE-2015-3636 →

📋 Description

CVE-2014-9715 — kernel: netfilter connection tracking extensions denial of service CVE-2015-2922 — kernel: denial of service (DoS) attack against IPv6 network stacks due to improper handling of Router Advertisements. CVE-2015-3636 — kernel: ping sockets: use-after-free leading to local privilege escalation

🎯 Affected products17

  • Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-1:3.10.0-229.rt56.158.el6rt.src as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-debug-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-debug-debuginfo-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-debug-devel-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-debuginfo-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-debuginfo-common-x86_64-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-devel-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-doc-1:3.10.0-229.rt56.158.el6rt.noarch as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-firmware-1:3.10.0-229.rt56.158.el6rt.noarch as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-trace-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-trace-debuginfo-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-trace-devel-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-vanilla-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-vanilla-debuginfo-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2
  • kernel-rt-vanilla-devel-1:3.10.0-229.rt56.158.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2

✅ Remediation

Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 Workaround: You can check whether ping socket functionality is enabled by examining the net.ipv4.ping_group_range sysctl value: ~]# sysctl net.ipv4.ping_group_range net.ipv4.ping_group_range = 1 0 "1 0" is the default value and disables the ping socket functionality even for root user. Any other value means that the ping socket functionality might be enabled for certain users on the system. To mitigate this vulnerability make sure that you either allow the functionality to trusted local users (groups) only or set the net.ipv4.ping_group_range sysctl to the default and disabled state: ~]# sysctl net.ipv4.ping_group_range="1 0" Please note that this might prevent some programs relying on this functionality from functioning properly.

🔗 References (7)