CVE-2017-5927

Page table walks conducted by the MMU during virtual to physical address translation leave a trace in the last level cache of modern ARM processors. By performing a side-channel attack on the MMU operations, it is possible to leak data and code pointers from JavaScript, breaking ASLR...

arm: memory corruption when freeing p2m pages

ISSUE DESCRIPTION When freeing pages used for stage-2 page tables, the freeing routine failed to remove these pages from an internally managed list they were put on during allocation. The same list node elements are also used by the hypervisor's page allocator. Subsequent manipulation of ARM's...

Debian DLA-833-1 : linux security update

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or have other impacts. CVE-2014-9888 Russell King found that on ARM systems, memory allocated for DMA buffers was mapped with executable permission. This made it easier to...

memory leak when destroying guest without PT devices

ISSUE DESCRIPTION Certain internal state is set up, during domain construction, in preparation for possible pass-through device assignment. On ARM and AMD V-i hardware this setup includes memory allocation. On guest teardown, cleanup was erroneously only performed when the guest actually had a...

oob access in cirrus bitblt copy

ISSUE DESCRIPTION When doing bitblt copy backwards, qemu should negate the blit width. This avoids an oob access before the start of video memory. IMPACT A malicious guest administrator can cause an out of bounds memory access, leading to information disclosure or privilege escalation. VULNERABLE...

Xen Intel VMX hvmemul_vmfunc() NULL Pointer Dereference DoS (XSA-203)

According to its self-reported version number, the Xen hypervisor installed on the remote host is missing a security update. It is, therefore, affected by a NULL pointer dereference flaw due to a failure to utilize necessary NULL checks before doing indirect function calls through the hvmemulvmfu...

Xen CMPXCHG8B Emulation Information Disclosure (XSA-200)

According to its self-reported version number, the Xen hypervisor installed on the remote host is missing a security update. It is, therefore, affected by an information disclosure vulnerability due to a flaw in the x86 instruction CMPXCHG8B when handling prefixes. This is triggered because legac...

Multi-Architecture GDB Enhanced Features for Exploiters & Reverse-Engineers: GEF

Multi-Architecture GDB Enhanced Features for Exploiters & Reverse-Engineers GEF is a kick-ass set of commands for X86, ARM, MIPS, PowerPC and SPARC to make GDB cool again for exploit dev. It is aimed to be used mostly by exploiters and reverse-engineers, to provides additional features to GDB usi...

OpenSSL 1.1.0 - Remote Client Denial of Service

OpenSSL 1.1.0 - Remote Client Denial of Service // Source: https://guidovranken.wordpress.com/2017/01/26/cve-2017-3730-openssl-1-1-0-remote-client-denial-of-service-affects-servers-as-well-poc/ / SSL server demonstration program Copyright C 2006-2015, ARM Limited, All Rights Reserved...

Multiplatform Open Source Binary Analysis: BARF Project

BARF : A multiplatform open source Binary Analysis and Reverse engineering Framework The analysis of binary code is a crucial activity in many areas of the computer sciences and software engineering disciplines ranging from software security and program analysis to reverse engineering. Manual...

Fedora 24 : xen (2016-bcbae0781f)

x86 CMPXCHG8B emulation fails to ignore operand size override XSA-200, CVE-2016-9932 1404262 ---- ARM guests may induce host asynchronous abort XSA-201, CVE-2016-9815, CVE-2016-9816, CVE-2016-9817, CVE-2016-9818 1399747 qemu: Divide by zero vulnerability in cirrusdocopy 1399055 CVE-2016-9921,...

Two CVE case study: how to use Android in the trusted zone-vulnerability warning-the black bar safety net

This article from the actual departure, about how to step by step use of Android in the trusted zone TrustZone on. Here I am using a Huawei hisilicon the Trusted Execution Environment Trusted Execution Environment, TEE on. First of all, I found one can gain kernel privilege vulnerabilities, and...

Fedora 23 : xen (2016-cc2916dcf4)

ARM guests may induce host asynchronous abort XSA-201, CVE-2016-9815, CVE-2016-9816, CVE-2016-9817, CVE-2016-9818 1399747 qemu: Divide by zero vulnerability in cirrusdocopy 1399055 CVE-2016-9921, CVE-2016-9922 Qemu: 9pfs: memory leakage via proxy/handle callbacks 1402278 qemu ioport array overflo...

Fedora 25 : xen (2016-1b868c23a9)

x86 CMPXCHG8B emulation fails to ignore operand size override XSA-200, CVE-2016-9932 1404262 ---- ARM guests may induce host asynchronous abort XSA-201, CVE-2016-9815, Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website...

x86: Mishandling of SYSCALL singlestep during emulation

ISSUE DESCRIPTION The typical behaviour of singlestepping exceptions is determined at the start of the instruction, with a DB trap being raised at the end of the instruction. SYSCALL and SYSRET, although we don't implement it behave differently because the typical behaviour allows userspace to...

DEBIAN-CVE-2015-8967

arch/arm64/kernel/sys.c in the Linux kernel before 4.0 allows local users to bypass the "strict page permissions" protection mechanism and modify the system-call table, and consequently gain privileges, by leveraging write access...

DEBIAN-CVE-2015-8966

arch/arm/kernel/sysoabi-compat.c in the Linux kernel before 4.4 allows local users to gain privileges via a crafted 1 FOFDGETLK, 2 FOFDSETLK, or 3 FOFDSETLKW command in an fcntl64 system call...

CVE-2015-8966

arch/arm/kernel/sysoabi-compat.c in the Linux kernel before 4.4 allows local users to gain privileges via a crafted 1 FOFDGETLK, 2 FOFDSETLK, or 3 FOFDSETLKW command in an fcntl64 system call...

Linux Kernel Local Elevation of Privilege Vulnerability (CNVD-2016-12203)

The Linux kernel is the kernel used by the operating system Linux, released by the Linux Foundation in the United States. A security vulnerability exists in the arch/arm/kernel/sysoabi-compat.c file in versions of Linux kernel prior to 4.4. A local attacker can exploit this vulnerability with the...

UBUNTU-CVE-2015-8967

arch/arm64/kernel/sys.c in the Linux kernel before 4.0 allows local users to bypass the "strict page permissions" protection mechanism and modify the system-call table, and consequently gain privileges, by leveraging write access...