what you don't know can hurt you
Home Files News &[SERVICES_TAB]About Contact Add New

Red Hat Security Advisory 2019-1487-01

Red Hat Security Advisory 2019-1487-01
Posted Jun 18, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-1487-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a denial of service vulnerability.

tags | advisory, denial of service, kernel
systems | linux, redhat
advisories | CVE-2018-1000004, CVE-2018-7566, CVE-2019-11477, CVE-2019-11478, CVE-2019-11479
SHA-256 | 0d2aaa315473f7fa3a1600801f003ad4d585fa316b9020702470ab42aa378bd8

Red Hat Security Advisory 2019-1487-01

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

====================================================================
Red Hat Security Advisory

Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2019:1487-01
Product: Red Hat Enterprise MRG for RHEL-6
Advisory URL: https://access.redhat.com/errata/RHSA-2019:1487
Issue date: 2019-06-17
CVE Names: CVE-2018-7566 CVE-2018-1000004 CVE-2019-11477
CVE-2019-11478 CVE-2019-11479
====================================================================
1. Summary:

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.

2. Relevant releases/architectures:

Red Hat MRG Realtime for RHEL 6 Server v.2 - noarch, x86_64

3. 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):

* An integer overflow flaw was found in the way the Linux kernel's
networking subsystem processed TCP Selective Acknowledgment (SACK)
segments. While processing SACK segments, the Linux kernel's socket buffer
(SKB) data structure becomes fragmented. Each fragment is about TCP maximum
segment size (MSS) bytes. To efficiently process SACK blocks, the Linux
kernel merges multiple fragmented SKBs into one, potentially overflowing
the variable holding the number of segments. A remote attacker could use
this flaw to crash the Linux kernel by sending a crafted sequence of SACK
segments on a TCP connection with small value of TCP MSS, resulting in a
denial of service (DoS). (CVE-2019-11477)

* kernel: race condition in snd_seq_write() may lead to UAF or OOB-access
(CVE-2018-7566)

* kernel: Race condition in sound system can lead to denial of service
(CVE-2018-1000004)

* Kernel: tcp: excessive resource consumption while processing SACK blocks
allows remote denial of service (CVE-2019-11478)

* Kernel: tcp: excessive resource consumption for TCP connections with low
MSS allows remote denial of service (CVE-2019-11479)

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):

* update the MRG 2.5.z 3.10 kernel-rt sources (BZ#1711010)

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

1535315 - CVE-2018-1000004 kernel: Race condition in sound system can lead to denial of service
1550142 - CVE-2018-7566 kernel: race condition in snd_seq_write() may lead to UAF or OOB-access
1711010 - update the MRG 2.5.z 3.10 kernel-rt sources
1719123 - CVE-2019-11477 Kernel: tcp: integer overflow while processing SACK blocks allows remote denial of service
1719128 - CVE-2019-11478 Kernel: tcp: excessive resource consumption while processing SACK blocks allows remote denial of service
1719129 - CVE-2019-11479 Kernel: tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of service

6. Package List:

Red Hat MRG Realtime for RHEL 6 Server v.2:

Source:
kernel-rt-3.10.0-693.50.3.rt56.644.el6rt.src.rpm

noarch:
kernel-rt-doc-3.10.0-693.50.3.rt56.644.el6rt.noarch.rpm
kernel-rt-firmware-3.10.0-693.50.3.rt56.644.el6rt.noarch.rpm

x86_64:
kernel-rt-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-debug-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-debug-devel-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-debuginfo-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-devel-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-trace-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-trace-devel-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-vanilla-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-vanilla-debuginfo-3.10.0-693.50.3.rt56.644.el6rt.x86_64.rpm
kernel-rt-vanilla-devel-3.10.0-693.50.3.rt56.644.el6rt.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/

7. References:

https://access.redhat.com/security/cve/CVE-2018-7566
https://access.redhat.com/security/cve/CVE-2018-1000004
https://access.redhat.com/security/cve/CVE-2019-11477
https://access.redhat.com/security/cve/CVE-2019-11478
https://access.redhat.com/security/cve/CVE-2019-11479
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/tcpsack

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2019 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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FNIF
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://www.redhat.com/mailman/listinfo/rhsa-announce
Login or Register to add favorites

File Archive:

December 2022

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Dec 1st
    2 Files
  • 2
    Dec 2nd
    12 Files
  • 3
    Dec 3rd
    0 Files
  • 4
    Dec 4th
    0 Files
  • 5
    Dec 5th
    0 Files
  • 6
    Dec 6th
    0 Files
  • 7
    Dec 7th
    0 Files
  • 8
    Dec 8th
    0 Files
  • 9
    Dec 9th
    0 Files
  • 10
    Dec 10th
    0 Files
  • 11
    Dec 11th
    0 Files
  • 12
    Dec 12th
    0 Files
  • 13
    Dec 13th
    0 Files
  • 14
    Dec 14th
    0 Files
  • 15
    Dec 15th
    0 Files
  • 16
    Dec 16th
    0 Files
  • 17
    Dec 17th
    0 Files
  • 18
    Dec 18th
    0 Files
  • 19
    Dec 19th
    0 Files
  • 20
    Dec 20th
    0 Files
  • 21
    Dec 21st
    0 Files
  • 22
    Dec 22nd
    0 Files
  • 23
    Dec 23rd
    0 Files
  • 24
    Dec 24th
    0 Files
  • 25
    Dec 25th
    0 Files
  • 26
    Dec 26th
    0 Files
  • 27
    Dec 27th
    0 Files
  • 28
    Dec 28th
    0 Files
  • 29
    Dec 29th
    0 Files
  • 30
    Dec 30th
    0 Files
  • 31
    Dec 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Hosting By
Rokasec
close