ID

VAR-201805-0950

CVE

CVE-2018-8897

TITLE

Hardware debug exception documentation may result in unexpected behavior

DESCRIPTION

A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs. In some circumstances, some operating systems or hypervisors may not expect or properly handle an Intel architecture hardware debug exception. Microsoft Windows is prone to a local privilege-escalation vulnerability. An attacker can exploit this issue to execute arbitrary code with elevated privileges. Intel Architecture (processor architecture) is a CPU specification developed by Intel Corporation for its processor. There are security vulnerabilities in the operating systems of multiple vendors. Systems from the following vendors are affected: Apple; DragonFly BSD Project; FreeBSD Project; Linux Kernel; Microsoft; Red Hat; SUSE Linux; Ubuntu; Vmware; Xen. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security update Advisory ID: RHSA-2018:1347-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1347 Issue date: 2018-05-08 CVE Names: CVE-2018-1087 CVE-2018-8897 CVE-2018-1000199 ===================================================================== 1. Summary: An update for kernel 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) - noarch, x86_64 Red Hat Enterprise Linux Server E4S (v. 7.2) - noarch, ppc64le, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 7.2) - x86_64 Red Hat Enterprise Linux Server Optional E4S (v. 7.2) - ppc64le, x86_64 Red Hat Enterprise Linux Server Optional TUS (v. 7.2) - x86_64 Red Hat Enterprise Linux Server TUS (v. 7.2) - noarch, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. 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: 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. 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/): 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 Server AUS (v. 7.2): Source: kernel-3.10.0-327.66.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.66.3.el7.noarch.rpm kernel-doc-3.10.0-327.66.3.el7.noarch.rpm x86_64: kernel-3.10.0-327.66.3.el7.x86_64.rpm kernel-debug-3.10.0-327.66.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.66.3.el7.x86_64.rpm kernel-devel-3.10.0-327.66.3.el7.x86_64.rpm kernel-headers-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.66.3.el7.x86_64.rpm perf-3.10.0-327.66.3.el7.x86_64.rpm perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm python-perf-3.10.0-327.66.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm Red Hat Enterprise Linux Server E4S (v. 7.2): Source: kernel-3.10.0-327.66.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.66.3.el7.noarch.rpm kernel-doc-3.10.0-327.66.3.el7.noarch.rpm ppc64le: kernel-3.10.0-327.66.3.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-327.66.3.el7.ppc64le.rpm kernel-debug-3.10.0-327.66.3.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.66.3.el7.ppc64le.rpm kernel-devel-3.10.0-327.66.3.el7.ppc64le.rpm kernel-headers-3.10.0-327.66.3.el7.ppc64le.rpm kernel-tools-3.10.0-327.66.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm kernel-tools-libs-3.10.0-327.66.3.el7.ppc64le.rpm perf-3.10.0-327.66.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm python-perf-3.10.0-327.66.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm x86_64: kernel-3.10.0-327.66.3.el7.x86_64.rpm kernel-debug-3.10.0-327.66.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.66.3.el7.x86_64.rpm kernel-devel-3.10.0-327.66.3.el7.x86_64.rpm kernel-headers-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.66.3.el7.x86_64.rpm perf-3.10.0-327.66.3.el7.x86_64.rpm perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm python-perf-3.10.0-327.66.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 7.2): Source: kernel-3.10.0-327.66.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.66.3.el7.noarch.rpm kernel-doc-3.10.0-327.66.3.el7.noarch.rpm x86_64: kernel-3.10.0-327.66.3.el7.x86_64.rpm kernel-debug-3.10.0-327.66.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.66.3.el7.x86_64.rpm kernel-devel-3.10.0-327.66.3.el7.x86_64.rpm kernel-headers-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.66.3.el7.x86_64.rpm perf-3.10.0-327.66.3.el7.x86_64.rpm perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm python-perf-3.10.0-327.66.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 7.2): x86_64: kernel-debug-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.66.3.el7.x86_64.rpm perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional E4S (v. 7.2): ppc64le: kernel-debug-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm kernel-debug-devel-3.10.0-327.66.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.66.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-327.66.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.66.3.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.66.3.el7.x86_64.rpm perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional TUS (v. 7.2): x86_64: kernel-debug-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.66.3.el7.x86_64.rpm perf-debuginfo-3.10.0-327.66.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.66.3.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-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 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. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFa8hjAXlSAg2UNWIIRAkH1AKCosff5yYgtYpdAUcf3SnlQOGVZfgCgiEYR g6/4/EzMBa+lSt9QhxSqC18= =IYAU -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . Description: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. 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. 5.9 server) - i386, ia64, noarch, x86_64 3. CVE-2018-10471 An error was discovered in the mitigations against Meltdown which could result in denial of service. CVE-2018-10472 Anthony Perard discovered that incorrect parsing of CDROM images can result in information disclosure. CVE-2018-10981 Jan Beulich discovered that malformed device models could result in denial of service. CVE-2018-10982 Roger Pau Monne discovered that incorrect handling of high precision event timers could result in denial of service and potentially privilege escalation. For the stable distribution (stretch), these problems have been fixed in version 4.8.3+comet2+shim4.10.0+comet3-1+deb9u6. We recommend that you upgrade your xen packages. For the detailed security status of xen please refer to its security tracker page at: https://security-tracker.debian.org/tracker/xen Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEtuYvPRKsOElcDakFEMKTtsN8TjYFAlr7PHoACgkQEMKTtsN8 TjbvyBAAqSJFsDcTo75hggE1faIttXR3UKOwJ4eSKbkf3G6/JnvotuO5z4bQXDBC XZfkL6kOTl579vmCGgCvBv/SrrPrJ1ibhrw+Dz1MIcjX4Yt9mb6NriWuMTObknca uw6qJakWZTB3tFcp3LlmN80B8lY/67XR8mQaZ4f0yHhGEfqIunEtSgLelmp5lLu2 M/m1iH9zQon3muhQiXiHJeMg1ghJ3xvFKbuEU9prih4NNinxquv0pmAzfbPCCBN6 E4cuEjArzdnwLydeWfCoLrFOZh5rvoMTmmK8gj2/KVlbC5YgJ5/xVlc89B4PaJKL m3oUV2dnLEpubC7uuXSOoejMnfbPcOGM4VYrmuIuxEfZZVNYE/NxvmNCZ+JDzQV7 Z939vOgyqyuojFFt7lgvoCWM2Q3xDRMrE9akK1KyAGmvyRzoczblw8N6dzL8sain gs5LUE/5dCJWQWv4IPz/V/nl50Lh+tYjbdVuZaiXxKYiqiWuCY0Ea+8QIb2UWGrk rC2BUYaoYBEo0vQhzBIi91E2hyQ+2Y6+zP6zTVTEA8PDw2YnfdffzydQ3Z9l4OSN IoTOojXPpMdcCSVzBC5OkvzBuQ6qzkVh3vftxajYazuiSrPJl8KenLJ6jFlpCzA3 p+140rFiElDCUkHacCmfs4zWQ+/ZLcoAppIxvxDEZYWyRJp3qgU= =KAUD -----END PGP SIGNATURE----- . -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 APPLE-SA-2018-05-08-1 Additional information for APPLE-SA-2018-04-24-2 Security Update 2018-001 Security Update 2018-001 addresses the following: Crash Reporter Available for: macOS High Sierra 10.13.4 Impact: An application may be able to gain elevated privileges Description: A memory corruption issue was addressed with improved error handling. The issue appears to be from an undocumented side effect of the instructions. An attacker might utilize this exception handling to gain access to Ring 0 and access sensitive memory or control operating system processes. CVE-2018-8897: Andy Lutomirski, Nick Peterson (linkedin.com/in/everdox) of Everdox Tech LLC Entry added May 8, 2018 LinkPresentation Available for: macOS High Sierra 10.13.4 Impact: Processing a maliciously crafted text message may lead to UI spoofing Description: A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation. Summary: Updated redhat-virtualization-host packages that fix several bugs and add various enhancements are now available. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Includes GlusterFS fixes for CVE-2018-1088, dhcp fixes for CVE-2018-1111, kernel fixes for CVE-2018-1087, and kernel fixes for CVE-2018-8897. A list of bugs fixed in this update is available in the Technical Notes book: https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.2/ht ml/technical_notes/ 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. Bugs fixed (https://bugzilla.redhat.com/): 1357247 - rhvh 4: reboot after install shows "4m[terminated]" and takes long to reboot 1374007 - [RFE] RHV-H does not default to LVM Thin Provisioning 1420068 - [RFE] RHV-H should meet NIST 800-53 partitioning requirements by default 1422676 - [Test Only] Test Ansible playbook for registration 1429485 - [RFE] Imgbased layers should be named with '%{name}-%{version}-%{release}' instead of %{name}-%{version} 1433394 - kdump could fill up /var filesystem while writing to /var/crash 1443965 - Libvirt is disabled on RHVH host 1454536 - HostedEngine setup fails if RHV-H timezone < UTC set during installation 1474268 - RHVH host displays "upgrade available" information on the engine after registering until an update is released 1489567 - Host Software tab does not show exact RHVH version anymore 1501161 - The version displays as "4.1" for subscribed product with RHVH 4.2 1502920 - File missing after upgrade of RHVH node from version RHVH-4.1-20170925.0 to latest. 1503148 - [RFE] translate between basic ntp configurations and chrony configurations 1516123 - tuned-adm timeout while adding the host in manager and the deployment will fail/take time to complete 1534855 - RHVH brand is missing on cockpit login screen. 6.5) - x86_64 3. Bug Fix(es): * The kernel build requirements have been updated to the GNU Compiler Collection (GCC) compiler version that has the support for Retpolines. The Retpolines mechanism is a software construct that leverages specific knowledge of the underlying hardware to mitigate the branch target injection, also known as Spectre variant 2 vulnerability described in CVE-2017-5715. (BZ#1554256) 4

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

Design Error

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2025-08-11T21:41:07.023000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE