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. Some operating systems and hypervisors Intel There is a problem that does not expect a debug exception in the hardware architecture, or does not handle it properly. Inappropriate checking or handling for exceptional situations (CWE-703) - CVE-2018-8897 Intel Software Developer Manual (SDM) Vol. SDM Vol 3A section 2.3 According to the debug exception EFLAGS Register IF flag (Interrupt Enable Flag) Is not prohibited. So in certain situations, certain Intel x86-64 Ring level after using architecture-specific instructions 3 Running on OS From component , Higher ring level ( many OS In the ring level 0) Debug exceptions pointing to the data in are enabled. This allows the attacker to API May be used to access sensitive memory information or manipulate high privileged operating system functions.An authenticated attacker could obtain sensitive data in memory and manipulate higher privileged operating system functions. 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. 5 ELS) - i386, noarch, s390x, x86_64 3. 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. 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. 6.4) - 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#1554251) 4. 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: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security update Advisory ID: RHSA-2018:1348-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1348 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 7.3 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) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) - x86_64 Red Hat Enterprise Linux Server EUS (v. 7.3) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 7.3) - ppc64, ppc64le, 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 ComputeNode EUS (v. 7.3): Source: kernel-3.10.0-514.48.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.48.3.el7.noarch.rpm kernel-doc-3.10.0-514.48.3.el7.noarch.rpm x86_64: kernel-3.10.0-514.48.3.el7.x86_64.rpm kernel-debug-3.10.0-514.48.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.48.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.48.3.el7.x86_64.rpm kernel-devel-3.10.0-514.48.3.el7.x86_64.rpm kernel-headers-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.48.3.el7.x86_64.rpm perf-3.10.0-514.48.3.el7.x86_64.rpm perf-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm python-perf-3.10.0-514.48.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3): x86_64: kernel-debug-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.48.3.el7.x86_64.rpm perf-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.3): Source: kernel-3.10.0-514.48.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.48.3.el7.noarch.rpm kernel-doc-3.10.0-514.48.3.el7.noarch.rpm ppc64: kernel-3.10.0-514.48.3.el7.ppc64.rpm kernel-bootwrapper-3.10.0-514.48.3.el7.ppc64.rpm kernel-debug-3.10.0-514.48.3.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm kernel-debug-devel-3.10.0-514.48.3.el7.ppc64.rpm kernel-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-514.48.3.el7.ppc64.rpm kernel-devel-3.10.0-514.48.3.el7.ppc64.rpm kernel-headers-3.10.0-514.48.3.el7.ppc64.rpm kernel-tools-3.10.0-514.48.3.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm kernel-tools-libs-3.10.0-514.48.3.el7.ppc64.rpm perf-3.10.0-514.48.3.el7.ppc64.rpm perf-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm python-perf-3.10.0-514.48.3.el7.ppc64.rpm python-perf-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm ppc64le: kernel-3.10.0-514.48.3.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-514.48.3.el7.ppc64le.rpm kernel-debug-3.10.0-514.48.3.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-514.48.3.el7.ppc64le.rpm kernel-devel-3.10.0-514.48.3.el7.ppc64le.rpm kernel-headers-3.10.0-514.48.3.el7.ppc64le.rpm kernel-tools-3.10.0-514.48.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm kernel-tools-libs-3.10.0-514.48.3.el7.ppc64le.rpm perf-3.10.0-514.48.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm python-perf-3.10.0-514.48.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm s390x: kernel-3.10.0-514.48.3.el7.s390x.rpm kernel-debug-3.10.0-514.48.3.el7.s390x.rpm kernel-debug-debuginfo-3.10.0-514.48.3.el7.s390x.rpm kernel-debug-devel-3.10.0-514.48.3.el7.s390x.rpm kernel-debuginfo-3.10.0-514.48.3.el7.s390x.rpm kernel-debuginfo-common-s390x-3.10.0-514.48.3.el7.s390x.rpm kernel-devel-3.10.0-514.48.3.el7.s390x.rpm kernel-headers-3.10.0-514.48.3.el7.s390x.rpm kernel-kdump-3.10.0-514.48.3.el7.s390x.rpm kernel-kdump-debuginfo-3.10.0-514.48.3.el7.s390x.rpm kernel-kdump-devel-3.10.0-514.48.3.el7.s390x.rpm perf-3.10.0-514.48.3.el7.s390x.rpm perf-debuginfo-3.10.0-514.48.3.el7.s390x.rpm python-perf-3.10.0-514.48.3.el7.s390x.rpm python-perf-debuginfo-3.10.0-514.48.3.el7.s390x.rpm x86_64: kernel-3.10.0-514.48.3.el7.x86_64.rpm kernel-debug-3.10.0-514.48.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.48.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.48.3.el7.x86_64.rpm kernel-devel-3.10.0-514.48.3.el7.x86_64.rpm kernel-headers-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.48.3.el7.x86_64.rpm perf-3.10.0-514.48.3.el7.x86_64.rpm perf-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm python-perf-3.10.0-514.48.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 7.3): ppc64: kernel-debug-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm kernel-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-514.48.3.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm kernel-tools-libs-devel-3.10.0-514.48.3.el7.ppc64.rpm perf-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm python-perf-debuginfo-3.10.0-514.48.3.el7.ppc64.rpm ppc64le: kernel-debug-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm kernel-debug-devel-3.10.0-514.48.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-514.48.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-514.48.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-514.48.3.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.48.3.el7.x86_64.rpm perf-debuginfo-3.10.0-514.48.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.48.3.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 iD8DBQFa8hyBXlSAg2UNWIIRAneEAKCislWXxms+w2cocgWLD3Mu2HMHkwCgiR+2 i4C0UytgQXhOcPkztivUlaU= =N2cw -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . ========================================================================== Ubuntu Security Notice USN-3641-2 May 08, 2018 linux, linux-lts-trusty vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 ESM Summary: Several security issues were fixed in the Linux kernel. This update provides the corresponding updates for Ubuntu 12.04 ESM. A local attacker could use this to cause a denial of service (system crash). This issue only affected the amd64 architecture. A local attacker in a KVM virtual machine could use this to cause a denial of service (guest VM crash) or possibly escalate privileges inside of the virtual machine. This issue only affected the i386 and amd64 architectures. (CVE-2018-1087) Andy Lutomirski discovered that the Linux kernel did not properly perform error handling on virtualized debug registers. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-1000199) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM: linux-image-3.13.0-147-generic 3.13.0-147.196~precise1 linux-image-3.13.0-147-generic-lpae 3.13.0-147.196~precise1 linux-image-3.2.0-134-generic 3.2.0-134.180 linux-image-3.2.0-134-generic-pae 3.2.0-134.180 linux-image-3.2.0-134-highbank 3.2.0-134.180 linux-image-3.2.0-134-omap 3.2.0-134.180 linux-image-3.2.0-134-powerpc-smp 3.2.0-134.180 linux-image-3.2.0-134-powerpc64-smp 3.2.0-134.180 linux-image-3.2.0-134-virtual 3.2.0-134.180 linux-image-generic 3.2.0.134.149 linux-image-generic-lpae-lts-trusty 3.13.0.147.138 linux-image-generic-lts-trusty 3.13.0.147.138 linux-image-generic-pae 3.2.0.134.149 linux-image-highbank 3.2.0.134.149 linux-image-omap 3.2.0.134.149 linux-image-powerpc 3.2.0.134.149 linux-image-powerpc-smp 3.2.0.134.149 linux-image-powerpc64-smp 3.2.0.134.149 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. 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. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-18:06.debugreg Security Advisory The FreeBSD Project Topic: Mishandling of x86 debug exceptions Category: core Module: kernel Announced: 2018-05-08 Credits: Nick Peterson, Everdox Tech LLC https://www.linkedin.com/in/everdox Andy Lutomirski Affects: All supported versions of FreeBSD. Corrected: 2018-05-08 17:03:33 UTC (stable/11, 11.2-PRERELEASE) 2018-05-08 17:12:10 UTC (releng/11.1, 11.1-RELEASE-p10) 2018-05-08 17:05:39 UTC (stable/10, 10.4-STABLE) 2018-05-08 17:12:10 UTC (releng/10.4, 10.4-RELEASE-p9) CVE Name: CVE-2018-8897 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>. Background On x86 architecture systems, the stack is represented by the combination of a stack segment and a stack pointer, which must remain in sync for proper operation. Instructions related to manipulating the stack segment have special handling to facilitate consistency with changes to the stack pointer. II. If that instruction is a system call or similar instruction that transfers control to the operating system, the debug exception will be handled in the kernel context instead of the user context. III. IV. Workaround No workaround is available. V. Solution Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date, using either a binary or source code patch, and then reboot. 1) To update your vulnerable system via a binary patch: Systems running a RELEASE version of FreeBSD on the i386 or amd64 platforms can be updated via the freebsd-update(8) utility: # freebsd-update fetch # freebsd-update install And reboot. 2) To update your vulnerable system via a source code patch: The following patches have been verified to apply to the applicable FreeBSD release branches. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 11.1] # fetch https://security.FreeBSD.org/patches/SA-18:06/debugreg.11.1.patch # fetch https://security.FreeBSD.org/patches/SA-18:06/debugreg.11.1.patch.asc # gpg --verify debugreg.11.1.patch.asc [FreeBSD 10.4] # fetch https://security.FreeBSD.org/patches/SA-18:06/debugreg.10.4.patch # fetch https://security.FreeBSD.org/patches/SA-18:06/debugreg.10.4.patch.asc # gpg --verify debugreg.10.4.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile and install your kernel as described in <URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the system. VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- stable/10/ r333370 releng/10.4/ r333371 stable/11/ r333369 releng/11.1/ r333371 - ------------------------------------------------------------------------- To see which files were modified by a particular revision, run the following command, replacing NNNNNN with the revision number, on a machine with Subversion installed: # svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base Or visit the following URL, replacing NNNNNN with the revision number: <URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII. (BZ#1554256) 4

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

code execution

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2025-10-20T00:36:29.694000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE