42 matches found
Apple Mac OS X Security Updates (HT208849)-03
Apple Mac OS X is prone to multiple vulnerabilities. SPDX-FileCopyrightText: 2018 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...
Major OS Players Misinterpret Intel Docs, and Now Kernels Can Be Hijacked
Multiple operating system vendors issued coordinated patches this week to address a common vulnerability across their platforms, which was introduced thanks to widespread misinterpretation of Intel developer documentation. According to the CERT/CC team, most major players including Apple, FreeBSD...
CVE-2018-8897
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 ...
Debug Exception May Cause Unexpected Behavior
CERT Coordination Center CERT/CC has released information for CVE-2018-8897 – unexpected behavior for debug exceptions. A local attacker could exploit this bug to obtain sensitive information. NCCIC encourages users and administrators to review CERT/CC’s Vulnerability Note VU 631579 for more...
Hardware debug exception documentation may result in unexpected behavior
Overview In some circumstances, some operating systems or hypervisors may not expect or properly handle an Intel architecture hardware debug exception. The error appears to be due to developer interpretation of existing documentation for certain Intel architecture interrupt/exception instructions...
RHEL 7 : kernel-rt (RHSA-2018:0412)
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:0412 advisory. - Kernel: KVM: debug exception via syscall emulation CVE-2017-7518 - Kernel: KVM: MMU potential stack buffer overrun during page walks...
Kernel: KVM: debug exception via syscall emulation
A flaw was found in the way the Linux KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges insi...
Important: Red Hat Security Advisory: kernel-rt security and bug fix update
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...
Kernel: KVM: debug exception via syscall emulation
A flaw was found in the way the Linux KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges insi...
kernel-tmb update provides 4.14 series and fixes security vulnerabilities
This kernel-tmb update provides an upgrade to the 4.14 longterm branch, currently based on 4.14.10. It also fixes at least the following security issues: An elevation of privilege vulnerability in the Broadcom wi-fi driver CVE-2017-0786. Use-after-free vulnerability in the sndpcminfo function in...
MGASA-2018-0062 kernel update provides 4.14 series and fixes security vulnerabilities
This kernel update provides an upgrade to the 4.14 longterm branch, currently based on 4.14.10. It also fixes at least the following security issues: An elevation of privilege vulnerability in the Broadcom wi-fi driver CVE-2017-0786. Use-after-free vulnerability in the sndpcminfo function in the...
kernel update provides 4.14 series and fixes security vulnerabilities
This kernel update provides an upgrade to the 4.14 longterm branch, currently based on 4.14.10. It also fixes at least the following security issues: An elevation of privilege vulnerability in the Broadcom wi-fi driver CVE-2017-0786. Use-after-free vulnerability in the sndpcminfo function in the...
CVE-2017-7518
A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to...
virt: guest to host DoS by triggering an infinite loop in microcode via #DB exception
It was found that the x86 ISA Instruction Set Architecture is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way sequential delivering of benign exceptions such as DB debug exception is handled. A privileged user...
virt: guest to host DoS by triggering an infinite loop in microcode via #DB exception
It was found that the x86 ISA Instruction Set Architecture is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way sequential delivering of benign exceptions such as DB debug exception is handled. A privileged user...
virt: guest to host DoS by triggering an infinite loop in microcode via #DB exception
It was found that the x86 ISA Instruction Set Architecture is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way sequential delivering of benign exceptions such as DB debug exception is handled. A privileged user...
virt: guest to host DoS by triggering an infinite loop in microcode via #DB exception
It was found that the x86 ISA Instruction Set Architecture is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way sequential delivering of benign exceptions such as DB debug exception is handled. A privileged user...
USN-2843-2 linux-lts-wily vulnerabilities
Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service system crash in the host OS. CVE-2015-8104 郭永刚 discovered that the pp...
USN-2844-1 linux-lts-utopic vulnerabilities
Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service system crash in the host OS. CVE-2015-8104 郭永刚 discovered that the pp...
virt: guest to host DoS by triggering an infinite loop in microcode via #DB exception
It was found that the x86 ISA Instruction Set Architecture is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way sequential delivering of benign exceptions such as DB debug exception is handled. A privileged user...