kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks

A flaw was found in the Linux kernel’s KVM implementation, where improper handing of the VMIO|VMPFNMAP VMAs in KVM bypasses RO checks and leads to pages being freed while still accessible by the VMM and guest. This flaw allows users who can start and control a VM to read/write random pages of...

kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks

A flaw was found in the Linux kernel’s KVM implementation, where improper handing of the VMIO|VMPFNMAP VMAs in KVM bypasses RO checks and leads to pages being freed while still accessible by the VMM and guest. This flaw allows users who can start and control a VM to read/write random pages of...

kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks

A flaw was found in the Linux kernel’s KVM implementation, where improper handing of the VMIO|VMPFNMAP VMAs in KVM bypasses RO checks and leads to pages being freed while still accessible by the VMM and guest. This flaw allows users who can start and control a VM to read/write random pages of...

Debian DLA-2690-1 : linux-4.19 security update

Several vulnerabilities have been discovered in the Linux kernel that may lead to the execution of arbitrary code, privilege escalation, denial of service, or information leaks. CVE-2020-24586, CVE-2020-24587, CVE-2020-26147 Mathy Vanhoef discovered that many Wi-Fi implementations, including...

Debian DLA-2689-1 : linux - LTS security update

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2689 advisory. Several vulnerabilities have been discovered in the Linux kernel that may lead to the execution of arbitrary code, privilege escalation, denial of service, or...

[SECURITY] [DLA 2689-1] linux security update

Debian LTS Advisory DLA-2689-1 [email protected] https://www.debian.org/lts/security/ Ben Hutchings June 22, 2021 https://wiki.debian.org/LTS Package : linux Version : 4.9.272-1 CVE ID : CVE-2020-24586 CVE-2020-24587 CVE-2020-24588 CVE-2020-25670 CVE-2020-25671 CVE-2020-25672...

[SECURITY] [DLA 2690-1] linux-4.19 security update

Debian LTS Advisory DLA-2690-1 [email protected] https://www.debian.org/lts/security/ Ben Hutchings June 22, 2021 https://wiki.debian.org/LTS Package : linux-4.19 Version : 4.19.194-1deb9u1 CVE ID : CVE-2020-24586 CVE-2020-24587 CVE-2020-24588 CVE-2020-25670 CVE-2020-25671 CVE-2020-2567...

CVE-2021-0230

CVE-2021-0230 affects Juniper Networks Junos OS on SRX Series devices with link aggregation (lag). When performing operations that fetch AE interface statistics (e.g., SNMP GET), a slow kernel memory leak can consume memory, potentially impacting traffic and requiring a reboot. Affected versions ...

CVE-2021-0230 Junos OS: SRX Series: Memory leak when querying Aggregated Ethernet (AE) interface statistics

On Juniper Networks SRX Series devices with link aggregation lag configured, executing any operation that fetches Aggregated Ethernet AE interface statistics, including but not limited to SNMP GET requests, causes a slow kernel memory leak. If all the available memory is consumed, the traffic wil...

FreeBSD : FreeBSD -- Memory disclosure by stale virtual memory mapping (13d37672-9791-11eb-b87a-901b0ef719ab)

A particular case of memory sharing is mishandled in the virtual memory system. It is possible and legal to establish a relationship where multiple descendant processes share a mapping which shadows memory of an ancestor process. In this scenario, when one process modifies memory through such a...

FreeBSD -- Memory disclosure by stale virtual memory mapping

Problem Description: A particular case of memory sharing is mishandled in the virtual memory system. It is possible and legal to establish a relationship where multiple descendant processes share a mapping which shadows memory of an ancestor process. In this scenario, when one process modifies...

Windows Exploitation Tricks: Trapping Virtual Memory Access

Posted by James Forshaw, Project Zero This blog is a continuation of my series of Windows exploitation tricks. This one describes an exploitation trick I’ve been trying to develop for years, succeeding mostly, more on that later on the latest versions of Windows 10. It’s a trick to trap access to...

Imagemagick Studio ImageMagick::WriteOnePNGImage() Code Issue Vulnerability

Imagemagick Studio ImageMagick is a suite of open source image processing software from ImageMagick Studio Imagemagick Studio, an American company. The software can read, convert or write images in many formats. A code issue vulnerability exists in ImageMagick versions 6.9.10-68 through 7.0.8-68,...

PT-2020-16024 · Linux +1 · Linux Kernel +1

Name of the Vulnerable Software and Affected Versions: Linux kernel versions 5.7.x through 5.8.6 Description: The issue is related to incorrect reference counting of the struct page that backs the vsyscall page, caused by gate page mishandling in the get gate page function in mm/gup.c. This resul...

CVE-2005-1513

Integer overflow in the strallocreadyplus function in qmail, when running on 64 bit platforms with a large amount of virtual memory, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a large SMTP request...

USN-4364-1: Linux kernel vulnerabilities

It was discovered that the ADIS16400 IIO IMU Driver for the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to cause a denial of service memory exhaustion. CVE-2019-19060 It was discovered that the vhost net driver in the Linux kernel...

Denial Of Service (DoS)

kernel is vulnerable to denial of service DoS. The vulnerability exists as a flaw was found in the Linux kernel virtual memory implementation. This could allow a local unprivileged user to cause a denial of service...

Memory corruption

The kernel memory usage represented as "temp" via 'show system virtual-memory' may constantly increase when Integrated Routing and Bridging IRB is configured with multiple underlay physical interfaces, and one interface flaps. This memory leak can affect running daemons processes, leading to an...

CVE-2020-1625 Junos OS: Kernel memory leak in virtual-memory due to interface flaps

The kernel memory usage represented as "temp" via 'show system virtual-memory' may constantly increase when Integrated Routing and Bridging IRB is configured with multiple underlay physical interfaces, and one interface flaps. This memory leak can affect running daemons processes, leading to an...

Code injection

It was found that the Red Hat Enterprise Linux 8 kpatch update did not include the complete fix for CVE-2018-12207. A flaw was found in the way Intel CPUs handle inconsistency between, virtual to physical memory address translations in CPU's local cache and system software's Paging structure...