RedHat 7: RHSA-2018:1355-01 Critical Kernel-RT Update for DoS Risks
May 08, 2018
•
LinuxSecurity Advisories
4 - 7 min read
Topics Covered
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
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==================================================================== Red Hat Security Advisory
Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2018:1355-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1355
Issue date: 2018-05-08
CVE Names: CVE-2017-16939 CVE-2018-1068 CVE-2018-1087
CVE-2018-8897 CVE-2018-1000199
====================================================================
1. Summary:
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.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Realtime (v. 7) - noarch, x86_64
Red Hat Enterprise Linux for Real Time for NFV (v. 7) - 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):
* 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)
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/):
1517220 - CVE-2017-16939 Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation
1549768 - kernel-rt: update to the RHEL7.5.z batch#1 source tree
1552048 - CVE-2018-1068 kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c
1566837 - CVE-2018-1087 Kernel: KVM: error in exception handling leads to wrong debug stack value
1567074 - CVE-2018-8897 Kernel: error in exception handling leads to DoS
1568477 - CVE-2018-1000199 kernel: ptrace() incorrect error handling leads to corruption and DoS
6. Package List:
Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source:
kernel-rt-3.10.0-862.2.3.rt56.806.el7.src.rpm
noarch:
kernel-rt-doc-3.10.0-862.2.3.rt56.806.el7.noarch.rpm
x86_64:
kernel-rt-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
kernel-rt-debug-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
kernel-rt-debug-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-debug-kvm-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-debuginfo-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-devel-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-kvm-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-trace-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-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
Red Hat Enterprise Linux Realtime (v. 7):
Source:
kernel-rt-3.10.0-862.2.3.rt56.806.el7.src.rpm
noarch:
kernel-rt-doc-3.10.0-862.2.3.rt56.806.el7.noarch.rpm
x86_64:
kernel-rt-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
kernel-rt-debug-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
kernel-rt-debug-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-debug-kvm-debuginfo-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-debuginfo-common-x86_64-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
kernel-rt-devel-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
kernel-rt-kvm-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-trace-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-trace-kvm-debuginfo-3.10.0-862.2.3.rt56.806.el7.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-2017-16939
https://access.redhat.com/security/cve/CVE-2018-1068
https://access.redhat.com/security/cve/CVE-2018-1087
https://access.redhat.com/security/cve/CVE-2018-8897
https://access.redhat.com/security/cve/CVE-2018-1000199
https://access.redhat.com/security/updates/classification#important
https://access.redhat.com/security/vulnerabilities/pop_ss
8. Contact:
The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact
Copyright 2018 Red Hat, Inc.
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RedHat 7: RHSA-2018:1355-01 Critical Kernel-RT Update for DoS Risks
red hat
May 8, 2018
An update for kernel-rt is now available for Red Hat Enterprise Linux 7
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.
Summary
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)
Topics Covered
References
https://access.redhat.com/security/cve/CVE-2017-16939 https://access.redhat.com/security/cve/CVE-2018-1068 https://access.redhat.com/security/cve/CVE-2018-1087 https://access.redhat.com/security/cve/CVE-2018-8897 https://access.redhat.com/security/cve/CVE-2018-1000199 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/security/vulnerabilities/pop_ss
Package List
Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source:
kernel-rt-3.10.0-862.2.3.rt56.806.el7.src.rpm
noarch:
kernel-rt-doc-3.10.0-862.2.3.rt56.806.el7.noarch.rpm
x86_64:
kernel-rt-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
kernel-rt-debug-3.10.0-862.2.3.rt56.806.el7.x86_64.rpm
kernel-rt-debug-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-debug-kvm-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-debuginfo-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-devel-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-kvm-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-trace-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-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
Red Hat Enterprise Linux Realtime (v. 7):
Source:
kernel-rt-3.10.0-862.2.3.rt56.806.el7.src.rpm
noarch:
Read the Full Advisory
Severity
important
Lowest
Low
Medium
High
Critical
Advisory ID: RHSA-2018:1355-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1355
Issue date: 2018-05-08
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 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.
Topics Covered
Relevant Releases Architectures
Red Hat Enterprise Linux Realtime (v. 7) - noarch, x86_64
Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64
Bugs Fixed
1517220 - CVE-2017-16939 Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation
1549768 - kernel-rt: update to the RHEL7.5.z batch#1 source tree
1552048 - CVE-2018-1068 kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c
1566837 - CVE-2018-1087 Kernel: KVM: error in exception handling leads to wrong debug stack value
1567074 - CVE-2018-8897 Kernel: error in exception handling leads to DoS
1568477 - CVE-2018-1000199 kernel: ptrace() incorrect error handling leads to corruption and DoS
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