Protect yourself against future threats.
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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2018.0055
Important: microcode_ctl security update
5 January 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: microcode_ctl
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Access Privileged Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-5715
Reference: ASB-2018.0002.2
ESB-2018.0052
ESB-2018.0044
ESB-2018.0042
Original Bulletin:
https://access.redhat.com/errata/RHSA-2018:0034
https://access.redhat.com/errata/RHSA-2018:0035
https://access.redhat.com/errata/RHSA-2018:0036
https://access.redhat.com/errata/RHSA-2018:0037
https://access.redhat.com/errata/RHSA-2018:0038
https://access.redhat.com/errata/RHSA-2018:0039
https://access.redhat.com/errata/RHSA-2018:0040
Comment: This bulletin contains seven (7) Red Hat security advisories.
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: microcode_ctl security update
Advisory ID: RHSA-2018:0034-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0034
Issue date: 2018-01-04
=====================================================================
1. Summary:
An update for microcode_ctl is now available for Red Hat Enterprise Linux
7.3 Extended Update Support.
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 ComputeNode EUS (v. 7.3) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.3) - x86_64
3. Description:
The microcode_ctl packages provide microcode updates for Intel and AMD
processors.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of instructions (a commonly
used performance optimization). There are three primary variants of the
issue which differ in the way the speculative execution can be exploited.
Variant CVE-2017-5715 triggers the speculative execution by utilizing
branch target injection. It relies on the presence of a precisely-defined
instruction sequence in the privileged code as well as the fact that memory
accesses may cause allocation into the microprocessor's data cache even for
speculatively executed instructions that never actually commit (retire). As
a result, an unprivileged attacker could use this flaw to cross the syscall
and guest/host boundaries and read privileged memory by conducting targeted
cache side-channel attacks. (CVE-2017-5715)
Note: This is the microcode counterpart of the CVE-2017-5715 kernel
mitigation.
Red Hat would like to thank Google Project Zero for reporting this issue.
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
Note: a system reboot is necessary for this update to take effect.
5. Bugs fixed (https://bugzilla.redhat.com/):
1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection
6. Package List:
Red Hat Enterprise Linux ComputeNode EUS (v. 7.3):
Source:
microcode_ctl-2.1-16.4.el7_3.src.rpm
x86_64:
microcode_ctl-2.1-16.4.el7_3.x86_64.rpm
microcode_ctl-debuginfo-2.1-16.4.el7_3.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.3):
Source:
microcode_ctl-2.1-16.4.el7_3.src.rpm
x86_64:
microcode_ctl-2.1-16.4.el7_3.x86_64.rpm
microcode_ctl-debuginfo-2.1-16.4.el7_3.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/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/speculativeexecution
https://access.redhat.com/security/cve/CVE-2017-5715
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: microcode_ctl security update
Advisory ID: RHSA-2018:0035-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0035
Issue date: 2018-01-04
=====================================================================
1. Summary:
An update for microcode_ctl is now available for Red Hat Enterprise Linux
7.2 Advanced Update Support, Red Hat Enterprise Linux 7.2 Telco Extended
Update Support, and Red Hat Enterprise Linux 7.2 Update Services for SAP
Solutions.
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 Server AUS (v. 7.2) - x86_64
Red Hat Enterprise Linux Server E4S (v. 7.2) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.2) - x86_64
3. Description:
The microcode_ctl packages provide microcode updates for Intel and AMD
processors.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of instructions (a commonly
used performance optimization). There are three primary variants of the
issue which differ in the way the speculative execution can be exploited.
Variant CVE-2017-5715 triggers the speculative execution by utilizing
branch target injection. It relies on the presence of a precisely-defined
instruction sequence in the privileged code as well as the fact that memory
accesses may cause allocation into the microprocessor's data cache even for
speculatively executed instructions that never actually commit (retire). As
a result, an unprivileged attacker could use this flaw to cross the syscall
and guest/host boundaries and read privileged memory by conducting targeted
cache side-channel attacks. (CVE-2017-5715)
Note: This is the microcode counterpart of the CVE-2017-5715 kernel
mitigation.
Red Hat would like to thank Google Project Zero for reporting this issue.
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
Note: a system reboot is necessary for this update to take effect.
5. Bugs fixed (https://bugzilla.redhat.com/):
1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 7.2):
Source:
microcode_ctl-2.1-12.el7_2.2.src.rpm
x86_64:
microcode_ctl-2.1-12.el7_2.2.x86_64.rpm
microcode_ctl-debuginfo-2.1-12.el7_2.2.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.2):
Source:
microcode_ctl-2.1-12.el7_2.2.src.rpm
x86_64:
microcode_ctl-2.1-12.el7_2.2.x86_64.rpm
microcode_ctl-debuginfo-2.1-12.el7_2.2.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 7.2):
Source:
microcode_ctl-2.1-12.el7_2.2.src.rpm
x86_64:
microcode_ctl-2.1-12.el7_2.2.x86_64.rpm
microcode_ctl-debuginfo-2.1-12.el7_2.2.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/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/speculativeexecution
https://access.redhat.com/security/cve/CVE-2017-5715
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: microcode_ctl security update
Advisory ID: RHSA-2018:0036-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0036
Issue date: 2018-01-04
=====================================================================
1. Summary:
An update for microcode_ctl is now available for Red Hat Enterprise Linux
6.7 Extended Update Support.
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 HPC Node EUS (v. 6.7) - x86_64
Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, x86_64
3. Description:
The microcode_ctl packages provide microcode updates for Intel and AMD
processors.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of instructions (a commonly
used performance optimization). There are three primary variants of the
issue which differ in the way the speculative execution can be exploited.
Variant CVE-2017-5715 triggers the speculative execution by utilizing
branch target injection. It relies on the presence of a precisely-defined
instruction sequence in the privileged code as well as the fact that memory
accesses may cause allocation into the microprocessor's data cache even for
speculatively executed instructions that never actually commit (retire). As
a result, an unprivileged attacker could use this flaw to cross the syscall
and guest/host boundaries and read privileged memory by conducting targeted
cache side-channel attacks. (CVE-2017-5715)
Note: This is the microcode counterpart of the CVE-2017-5715 kernel
mitigation.
Red Hat would like to thank Google Project Zero for reporting this issue.
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
Note: a system reboot is necessary for this update to take effect.
5. Bugs fixed (https://bugzilla.redhat.com/):
1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection
6. Package List:
Red Hat Enterprise Linux HPC Node EUS (v. 6.7):
Source:
microcode_ctl-1.17-20.1.el6_7.src.rpm
x86_64:
microcode_ctl-1.17-20.1.el6_7.x86_64.rpm
microcode_ctl-debuginfo-1.17-20.1.el6_7.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 6.7):
Source:
microcode_ctl-1.17-20.1.el6_7.src.rpm
i386:
microcode_ctl-1.17-20.1.el6_7.i686.rpm
microcode_ctl-debuginfo-1.17-20.1.el6_7.i686.rpm
x86_64:
microcode_ctl-1.17-20.1.el6_7.x86_64.rpm
microcode_ctl-debuginfo-1.17-20.1.el6_7.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/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/speculativeexecution
https://access.redhat.com/security/cve/CVE-2017-5715
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: microcode_ctl security update
Advisory ID: RHSA-2018:0037-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0037
Issue date: 2018-01-04
=====================================================================
1. Summary:
An update for microcode_ctl is now available for Red Hat Enterprise Linux
6.6 Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco Extended
Update Support.
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 Server AUS (v. 6.6) - x86_64
Red Hat Enterprise Linux Server TUS (v. 6.6) - x86_64
3. Description:
The microcode_ctl packages provide microcode updates for Intel and AMD
processors.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of instructions (a commonly
used performance optimization). There are three primary variants of the
issue which differ in the way the speculative execution can be exploited.
Variant CVE-2017-5715 triggers the speculative execution by utilizing
branch target injection. It relies on the presence of a precisely-defined
instruction sequence in the privileged code as well as the fact that memory
accesses may cause allocation into the microprocessor's data cache even for
speculatively executed instructions that never actually commit (retire). As
a result, an unprivileged attacker could use this flaw to cross the syscall
and guest/host boundaries and read privileged memory by conducting targeted
cache side-channel attacks. (CVE-2017-5715)
Note: This is the microcode counterpart of the CVE-2017-5715 kernel
mitigation.
Red Hat would like to thank Google Project Zero for reporting this issue.
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
Note: a system reboot is necessary for this update to take effect.
5. Bugs fixed (https://bugzilla.redhat.com/):
1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 6.6):
Source:
microcode_ctl-1.17-19.1.el6_6.src.rpm
x86_64:
microcode_ctl-1.17-19.1.el6_6.x86_64.rpm
microcode_ctl-debuginfo-1.17-19.1.el6_6.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 6.6):
Source:
microcode_ctl-1.17-19.1.el6_6.src.rpm
x86_64:
microcode_ctl-1.17-19.1.el6_6.x86_64.rpm
microcode_ctl-debuginfo-1.17-19.1.el6_6.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/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/speculativeexecution
https://access.redhat.com/security/cve/CVE-2017-5715
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: microcode_ctl security update
Advisory ID: RHSA-2018:0038-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0038
Issue date: 2018-01-04
=====================================================================
1. Summary:
An update for microcode_ctl is now available for Red Hat Enterprise Linux
6.4 Advanced Update Support.
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 Server AUS (v. 6.4) - x86_64
3. Description:
The microcode_ctl packages provide microcode updates for Intel and AMD
processors.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of instructions (a commonly
used performance optimization). There are three primary variants of the
issue which differ in the way the speculative execution can be exploited.
Variant CVE-2017-5715 triggers the speculative execution by utilizing
branch target injection. It relies on the presence of a precisely-defined
instruction sequence in the privileged code as well as the fact that memory
accesses may cause allocation into the microprocessor's data cache even for
speculatively executed instructions that never actually commit (retire). As
a result, an unprivileged attacker could use this flaw to cross the syscall
and guest/host boundaries and read privileged memory by conducting targeted
cache side-channel attacks. (CVE-2017-5715)
Note: This is the microcode counterpart of the CVE-2017-5715 kernel
mitigation.
Red Hat would like to thank Google Project Zero for reporting this issue.
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
Note: a system reboot is necessary for this update to take effect.
5. Bugs fixed (https://bugzilla.redhat.com/):
1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 6.4):
Source:
microcode_ctl-1.17-16.1.el6_4.src.rpm
x86_64:
microcode_ctl-1.17-16.1.el6_4.x86_64.rpm
microcode_ctl-debuginfo-1.17-16.1.el6_4.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/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/speculativeexecution
https://access.redhat.com/security/cve/CVE-2017-5715
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: microcode_ctl security update
Advisory ID: RHSA-2018:0039-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0039
Issue date: 2018-01-04
=====================================================================
1. Summary:
An update for microcode_ctl is now available for Red Hat Enterprise Linux
6.2 Advanced Update Support.
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 Server AUS (v. 6.2) - x86_64
3. Description:
The microcode_ctl packages provide microcode updates for Intel and AMD
processors.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of instructions (a commonly
used performance optimization). There are three primary variants of the
issue which differ in the way the speculative execution can be exploited.
Variant CVE-2017-5715 triggers the speculative execution by utilizing
branch target injection. It relies on the presence of a precisely-defined
instruction sequence in the privileged code as well as the fact that memory
accesses may cause allocation into the microprocessor's data cache even for
speculatively executed instructions that never actually commit (retire). As
a result, an unprivileged attacker could use this flaw to cross the syscall
and guest/host boundaries and read privileged memory by conducting targeted
cache side-channel attacks. (CVE-2017-5715)
Note: This is the microcode counterpart of the CVE-2017-5715 kernel
mitigation.
Red Hat would like to thank Google Project Zero for reporting this issue.
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
Note: a system reboot is necessary for this update to take effect.
5. Bugs fixed (https://bugzilla.redhat.com/):
1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 6.2):
Source:
microcode_ctl-1.17-9.1.el6_2.src.rpm
x86_64:
microcode_ctl-1.17-9.1.el6_2.x86_64.rpm
microcode_ctl-debuginfo-1.17-9.1.el6_2.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/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/speculativeexecution
https://access.redhat.com/security/cve/CVE-2017-5715
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: microcode_ctl security update
Advisory ID: RHSA-2018:0040-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0040
Issue date: 2018-01-04
=====================================================================
1. Summary:
An update for microcode_ctl is now available for Red Hat Enterprise Linux
6.5 Advanced Update Support.
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 Server AUS (v. 6.5) - x86_64
3. Description:
The microcode_ctl packages provide microcode updates for Intel and AMD
processors.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of instructions (a commonly
used performance optimization). There are three primary variants of the
issue which differ in the way the speculative execution can be exploited.
Variant CVE-2017-5715 triggers the speculative execution by utilizing
branch target injection. It relies on the presence of a precisely-defined
instruction sequence in the privileged code as well as the fact that memory
accesses may cause allocation into the microprocessor's data cache even for
speculatively executed instructions that never actually commit (retire). As
a result, an unprivileged attacker could use this flaw to cross the syscall
and guest/host boundaries and read privileged memory by conducting targeted
cache side-channel attacks. (CVE-2017-5715)
Note: This is the microcode counterpart of the CVE-2017-5715 kernel
mitigation.
Red Hat would like to thank Google Project Zero for reporting this issue.
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
Note: a system reboot is necessary for this update to take effect.
5. Bugs fixed (https://bugzilla.redhat.com/):
1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 6.5):
Source:
microcode_ctl-1.17-17.el6_5.2.src.rpm
x86_64:
microcode_ctl-1.17-17.el6_5.2.x86_64.rpm
microcode_ctl-debuginfo-1.17-17.el6_5.2.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/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/speculativeexecution
https://access.redhat.com/security/cve/CVE-2017-5715
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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- --------------------------END INCLUDED TEXT--------------------
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site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
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from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
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Previous advisories and external security bulletins can be retrieved from:
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
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