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 MRG 2.

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: MIDI driver race condition leads to a double-free (CVE-2018-10902)
  
• kernel: net/rxrpc: overflow in decoding of krb5 principal (CVE-2017-7482)
  
• kernel: Missing length check of payload in net/sctp/sm_make_chunk.c:_sctp_make_chunk() function allows denial of service (CVE-2018-5803)
  
• kernel: use-after-free in ntfs_read_locked_inode in the ntfs.ko (CVE-2018-12929)
  
• kernel: stack-based out-of-bounds write in ntfs_end_buffer_async_read in the ntfs.ko (CVE-2018-12930)
  
• kernel: stack-based out-of-bounds write in ntfs_attr_find in the ntfs.ko (CVE-2018-12931)
  

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• Remove the NTFS module from the MRG 2.5.x realtime kernel (BZ#1674523)
  
• update the MRG 2.5.z 3.10 kernel-rt sources (BZ#1674935)
  

Users of kernel-rt are advised to upgrade to these updated packages, which fix these bugs.

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

• MRG Realtime 2 x86_64

Fixes

• BZ - 1446288 - CVE-2017-7482 kernel: net/rxrpc: overflow in decoding of krb5 principal
• BZ - 1551051 - CVE-2018-5803 kernel: Missing length check of payload in net/sctp/sm_make_chunk.c:_sctp_make_chunk() function allows denial of service
• BZ - 1590720 - CVE-2018-10902 kernel: MIDI driver race condition leads to a double-free
• BZ - 1597831 - CVE-2018-12929 kernel: use-after-free in ntfs_read_locked_inode in the ntfs.ko
• BZ - 1597837 - CVE-2018-12930 kernel: stack-based out-of-bounds write in ntfs_end_buffer_async_read in the ntfs.ko
• BZ - 1597843 - CVE-2018-12931 kernel: stack-based out-of-bounds write in ntfs_attr_find in the ntfs.ko
• BZ - 1674935 - update the MRG 2.5.z 3.10 kernel-rt sources

CVEs

• CVE-2017-7482
• CVE-2018-5803
• CVE-2018-10902
• CVE-2018-12929
• CVE-2018-12930
• CVE-2018-12931

References

• https://access.redhat.com/security/updates/classification/#important

MRG Realtime 2

SRPM
kernel-rt-3.10.0-693.46.1.rt56.639.el6rt.src.rpm	SHA-256: 7559179c88acebda54a11cc5abc0c52605e2625e33b97f32c0f6b0376e5bc880
x86_64
kernel-rt-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 98a5b44f20d0c87f45798e7446a2fe7a15a80b36fddc50440056a8388fad1fc6
kernel-rt-debug-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 8be5edb4028fa68f257e696f9bdfd2db2a804457704073cf5bda762c2fb383cd
kernel-rt-debug-debuginfo-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 27740f84db775fbfb401624ea3c092357340569248d94a4abe7fe5c20d55cbdf
kernel-rt-debug-devel-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: c742e3bcfb3d7fe5f5a0d05de11c6a33ebc4c0f39bb29b69b6ab1e197c484838
kernel-rt-debuginfo-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 1852fa8655b0b46c3f8b9ab7427c4b59977ef285e3b724bf2deeb84cb523916b
kernel-rt-debuginfo-common-x86_64-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: b4c1c9369085b1ec7e8b6db18576fcdec50f46ee263039be5cce17a8c57d21fd
kernel-rt-devel-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 295f9d25747d93a3b57043d86a6c09a8f072e1bdf3a318fd28b502c9a9b99d02
kernel-rt-doc-3.10.0-693.46.1.rt56.639.el6rt.noarch.rpm	SHA-256: 4a2521ccb856c63a79f467c8beb0f70b7beebb526018cdff56fe978908908a36
kernel-rt-firmware-3.10.0-693.46.1.rt56.639.el6rt.noarch.rpm	SHA-256: b567c33f2623f9208c6fa1645579261bb09bc9d26557991347168c04ead45821
kernel-rt-trace-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 9424a0b53e924fe3a10c1f2099ca15d1f1823b5928a45219016920e36328466c
kernel-rt-trace-debuginfo-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 0abd800257a28e9db1fa45f06e4af08f4eabb0e5aa644832bfb8c7ea55491aa3
kernel-rt-trace-devel-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 8a6a3016f432c4a11695fab6daa0c684b287d5739b78a9c0823397bf52ba4e49
kernel-rt-vanilla-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: ccdc876af7fe9412c931db13a3f3ea80796eac9d1e4be916e1ffa65db80f3266
kernel-rt-vanilla-debuginfo-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 41b024842ba18d0a5323766911b406ee901ecf192c79385bc677f60b4c79853c
kernel-rt-vanilla-devel-3.10.0-693.46.1.rt56.639.el6rt.x86_64.rpm	SHA-256: 88705ee67b7580eb644f6b9c6139d16fb2f51e847cf3ab09c4e84cfdbc0d474a