Important: Red Hat Security Advisory: ovmf security update

An update for ovmf 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 the...

Linux - (page->_refcount) Overflow via FUSE Exploit

Linux: page-refcount overflow via FUSE with 140GiB RAM usage Tested on: Debian Buster distro kernel "4.19.0-1-amd64 1 SMP Debian 4.19.12-1 2018-12-22" KVM guest with 160000MiB RAM A while back, there was some discussion about possible overflows of the mapcount in struct page, started by Daniel...

CVE-2019-11487

The Linux kernel before 5.1-rc5 allows page-refcount reference count overflow, with resultant use-after-free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipefsi.h, kernel/trace/trace.c, mm/gup.c, and...

Linux - page-_refcount Overflow via FUSE

Linux - page-refcount Overflow via FUSE Linux: page-refcount overflow via FUSE with 140GiB RAM usage Tested on: Debian Buster distro kernel "4.19.0-1-amd64 1 SMP Debian 4.19.12-1 2018-12-22" KVM guest with 160000MiB RAM A while back, there was some discussion about possible overflows of the...

UBUNTU-CVE-2019-11487

The Linux kernel before 5.1-rc5 allows page-refcount reference count overflow, with resultant use-after-free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipefsi.h, kernel/trace/trace.c, mm/gup.c, and...

Linux - 'page->_refcount' Overflow via FUSE

Linux: page-refcount overflow via FUSE with 140GiB RAM usage Tested on: Debian Buster distro kernel "4.19.0-1-amd64 1 SMP Debian 4.19.12-1 2018-12-22" KVM guest with 160000MiB RAM A while back, there was some discussion about possible overflows of the mapcount in struct page, started by Daniel...

[SECURITY] Fedora 30 Update: yaws-2.0.6-1.fc30

HTTP 1.0 and HTTP 1.1 web server capable of both static content page delivery and dynamic content generation using embedded Erlang code in the HTML pages. It provides virtual hosting capabilities and implements HTTP tracing and other debugging functionality such as interactive interpreter...

Product update: Virtuozzo 7.0 Update 9 Hotfix 2 (7.0.9-547)

The Hotfix 2 for for Virtuozzo 7.0.9 provides stability and usability bug fixes. Vulnerability id: PSBM-91577 Migration of a container from a Virtuozzo 7 Update 8 host to a Virtuozzo 7 Update 9 host initiated from Virtuozzo Automator could lead to a crash of vzmigrate. Vulnerability id: PSBM-9186...

Service Provider guide on troubleshooting slow merge in Cloud Connect jobs

Challenge During synthetic operations, data processing is handled solely by a Cloud repository. This article provides troubleshooting recommendations which may help to correctly identify the cause of slowness, increase performance and shorten backup window. Solution 1 Storage performance The firs...

OSFMount - Mount Disk Images & Create RAM Drives

OSFMount allows you to mount local disk image files bit-for-bit copies of a disk partition in Windows with a drive letter. You can then analyze the disk image file with PassMark OSForensics™ by using the mounted volume's drive letter. By default, the image files are mounted as read only so that t...

macOS < 10.14.3 / iOS < 12.1.3 - Arbitrary mach Port Name Deallocation in XPC Services due to Invalid mach Message Parsing in _xpc_serializer_unpack

/ xpcserializerunpack in libxpc parses mach messages which contain xpc messages. There are two reasons for an xpc mach message to contain descriptors: if the message body is large, then it's sent as a MACHMSGOOLDESCRIPTOR. Also if the message contains other port resources eg memory entry ports th...

Cache-load gadgets exploitable with L1TF

ISSUE DESCRIPTION Previously reported vulnerabilities CVE-2017-5753 / XSA-254 Spectre V1 and CVE-2018-3646 / XSA-273 L1TF can, when combined, be leveraged to more easily gather leaked information. A Spectre v1 gadget is a speculation sequence which starts with a conditional branch, contains a...

Updated libvncserver & x11vnc packages fix security vulnerabilities

A heap use-after-free vulnerability in the server code of the file transfer extension, which can result in remote code execution. This attack appears to be exploitable via network connectivity CVE-2018-6307. A heap use-after-free vulnerability in the server code of the file transfer extension,...

Denial Of Service (DoS)

OpenStack Compute nova is vulnerable to denial of service DoS attack. It is possible because it does not restrict qemu-ing calls to consume as much as 4 GB of RAM on the compute host by uploading a malicious image, leading to out-of-memory errors and negatively affect other running tenant instanc...

CVE-2018-20021

LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code. Vulnerability allows attacker to consume excessive amount of resources like CPU and RAM...

Medium: python34, python36

Issue Overview: Python's elementtree C accelerator failed to initialise Expat's hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by contructing an XML document that would cause pathological hash collisions in Expat's internal data...

Amazon Linux 2 : python3 (ALAS-2018-1132)

Python's elementtree C accelerator failed to initialise Expat's hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by contructing an XML document that would cause pathological hash collisions in Expat's internal data structures, consuming...

Code injection

LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code. Vulnerability allows attacker to consume excessive amount of resources like CPU and RAM...

CVE-2018-20021

LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code. Vulnerability allows attacker to consume excessive amount of resources like CPU and RAM...

CVE-2018-20021

LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code. Vulnerability allows attacker to consume excessive amount of resources like CPU and RAM...