Malware monitor - leveraging PyREBox for malware analysis

This post was authored by Xabier Ugarte Pedrero In July 2017 we released PyREBox, a Python Scriptable Reverse Engineering Sandbox as an open source tool. This project is part of our continuous effort to create new tools to improve our workflows. PyREBox is a versatile instrumentation framework...

Security update for libvirt (important)

This update for libvirt and virt-manager fixes the following issues: Security issues fixed: - CVE-2017-5715: Fixes for speculative side channel attacks aka "SpectreAttack" var2 bsc1079869. - CVE-2018-6764: Fixed guest executable code injection via libnssdns.so loaded by libvirtlxc before init...

SUSE SLED12 / SLES12 Security Update : libvirt (SUSE-SU-2018:0920-1) (Spectre)

This update for libvirt and virt-manager fixes the following issues: Security issues fixed : - CVE-2017-5715: Fixes for speculative side channel attacks aka 'SpectreAttack' var2 bsc1079869. - CVE-2018-6764: Fixed guest executable code injection via libnssdns.so loaded by libvirtlxc before init...

SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2018:0831-1) (Spectre)

This update for qemu fixes the following issues: This update has the next round of Spectre v2 related patches, which now integrate with corresponding changes in libvirt. CVE-2017-5715 bsc1068032 The January 2018 release of qemu initially addressed the Spectre v2 vulnerability for KVM guests by...

openSUSE Security Update : qemu (openSUSE-2018-291) (Spectre)

This update for qemu fixes the following issues : This update has the next round of Spectre v2 related patches, which now integrate with corresponding changes in libvirt. CVE-2017-5715 bsc1068032 The January 2018 release of qemu initially addressed the Spectre v2 vulnerability for KVM guests by...

SUSE-SU-2018:0762-1 Security update for qemu

This update for qemu fixes the following issues: This update has the next round of Spectre v2 related patches, which now integrate with corresponding changes in libvirt. CVE-2017-5715 bsc1068032 The January 2018 release of qemu initially addressed the Spectre v2 vulnerability for KVM guests by...

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...

Debian DSA-4131-1 : xen - security update

Multiple vulnerabilities have been discovered in the Xen hypervisor : - CVE-2018-7540 Jann Horn discovered that missing checks in page table freeing may result in denial of service. - CVE-2018-7541 Jan Beulich discovered that incorrect error handling in grant table checks may result in...

DEBIAN-CVE-2018-7550

The loadmultiboot function in hw/i386/multiboot.c in Quick Emulator aka QEMU allows local guest OS users to execute arbitrary code on the QEMU host via a mhloadendaddr value greater than mhbssendaddr, which triggers an out-of-bounds read or write memory access...

Xen Denial of Service Vulnerability (CNVD-2018-04652)

Xen is an open source virtual machine monitor developed by the Xen Project. A denial of service vulnerability exists in 4.10.x and earlier versions of Xen. x86 PV guest OS users can exploit this vulnerability to cause a denial of service host OS CPU hang via a non-preemptive L3/L4 page table...

DoS via non-preemptable L3/L4 pagetable freeing

ISSUE DESCRIPTION Guests have the ability to request removal of memory from themselves. This operation is intended to be requested for normal read/write pages, but is also permitted to be used on other types of pages. So far this in particular included pages pinned to their current type, with the...

kernel security update

2.6.18-419.0.0.0.8 - Backport CVEs to RHCK/OL5 orabug 27547712 CVE-2017-5753 CVE-2017-5754 - 2.6.18-419.0.0.0.5 - fs fix kernel panic on boot on ia64 guests Honglei Wang orabug 26934100...

kernel security update

kernel 2.6.18-419.0.0.0.5 - fs fix kernel panic on boot on ia64 guests Honglei Wang orabug 26934100 2.6.18-419.0.0.0.4 - fs fix bug in loading of PIE binaries Michael Davidson orabug 26916951 CVE-2017-1000253...

SUSE SLED12 / SLES12 Security Update : libvirt (SUSE-SU-2018:0385-1)

This update for libvirt provides several fixes. This security issue was fixed : - CVE-2018-5748: Prevent resource exhaustion via qemuMonitorIORead method which allowed to cause DoS bsc1076500. These security issues were fixed : - Add a qemu hook script providing functionality similar to Xen's...

SUSE-SU-2018:0372-1 security update for spice-vdagent

This update for spice-vdagent provides the following fixes: This security issue was fixed: - CVE-2017-15108: Properly escape save directory that is passed to the shell to prevent local attacker with access to the session the agent runs from injecting arbitrary commands to be executed bsc1070724...

SUSE SLED12 / SLES12 Security Update : libvirt (SUSE-SU-2018:0279-1)

This update for libvirt provides several fixes. This security issue was fixed : - CVE-2018-5748: Prevent resource exhaustion via qemuMonitorIORead method which allowed to cause DoS bsc1076500. These security issues were fixed : - Add a qemu hook script providing functionality similar to Xen's...

Fedora 27 : xen (2017-333ea49a63)

xen: various flaws 1490884 Missing NUMA node parameter verification XSA-231, CVE-2017-14316 Missing check for grant table XSA-232, CVE-2017-14318 cxenstored: Race in domain cleanup XSA-233, CVE-2017-14317 insufficient grant unmapping checks for x86 PV guests XSA-234, CVE-2017-14319 Note that...

Fedora 27 : xen (2017-5945560816)

another patch related to the XSA-240, CVE-2017-15595 issue x86 PV guests may gain access to internally used page XSA-248 broken x86 shadow mode refcount overflow check XSA-249 improper x86 shadow mode refcount error handling XSA-250 improper bug check in x86 log-dirty handling XSA-251 Note that...

Beers with Talos EP 19: The "Best" of BWT

Beers with Talos BWT Podcast Episode 19 is now available. Download this episode and subscribe to Beers with Talos: If iTunes and Google Play aren't your thing: www.talosintelligence.com/podcast EP19 Show Notes: Quotes intended, we think you know why. Mitch takes control to present the best of the...

ALPINE-CVE-2017-17566

An issue was discovered in Xen through 4.9.x allowing PV guest OS users to cause a denial of service host OS crash or gain host OS privileges in shadow mode by mapping a certain auxiliary page...