1118 matches found
CVE-2019-15794 Reference counting error in overlayfs/shiftfs error path when used in conjuction with aufs
Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma-vmfile in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vmfile points. On...
systemd-machined Incorrect Reference Decrement
systemd: systemd-machined decrements reference count when references still held I've been looking at the version of systemd shipped in Fedora 31 approximately ef677436aa203c24816021dd698b57f219f0ff64 I noticed that systemd-machined caches image objects, and uses reference counting to keep track o...
Huawei EulerOS: Security Advisory for dhcp (EulerOS-SA-2019-1443)
The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2020 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...
Kernel: KVM: potential use-after-free via kvm_ioctl_create_device()
A use-after-free vulnerability was found in the way the Linux kernel's KVM hypervisor implements its device control API. While creating a device via kvmioctlcreatedevice, the device holds a reference to a VM object, later this reference is transferred to the caller's file descriptor table. If suc...
USN-4204-1 python-psutil vulnerability
Riccardo Schirone discovered that psutil incorrectly handled certain reference counting operations. An attacker could use this issue to cause psutil to crash, resulting in a denial of service, or possibly execute arbitrary code...
Ubuntu 19.10 - Refcount Underflow and Type Confusion in shiftfs
Ubuntu 19.10 - Refcount Underflow and Type Confusion in shiftfs Tested on Ubuntu 19.10, kernel "5.3.0-19-generic 20-Ubuntu". Ubuntu ships a filesystem "shiftfs" in fs/shiftfs.c in the kernel tree that doesn't exist upstream. This filesystem can be mounted from user namespaces, meaning that this i...
Ubuntu 19.10 - Refcount Underflow and Type Confusion in shiftfs
Tested on Ubuntu 19.10, kernel "5.3.0-19-generic 20-Ubuntu". Ubuntu ships a filesystem "shiftfs" in fs/shiftfs.c in the kernel tree that doesn't exist upstream. This filesystem can be mounted from user namespaces, meaning that this is attack surface from unprivileged userspace in the default...
Debian DLA-1998-1 : python-psutil security update
It was discovered that there were multiple double free vulnerabilities in python-psutil, a Python module providing convenience functions for accessing system process data. This was caused by incorrect reference counting handling within for/while loops that convert system data into said Python...
Ubuntu 19.10 - Refcount Underflow and Type Confusion in shiftfs Exploit
Tested on Ubuntu 19.10, kernel "5.3.0-19-generic 20-Ubuntu". Ubuntu ships a filesystem "shiftfs" in fs/shiftfs.c in the kernel tree that doesn't exist upstream. This filesystem can be mounted from user namespaces, meaning that this is attack surface from unprivileged userspace in the default...
Ubuntu shiftfs refcount Underflow / Type Confusion
Ubuntu: refcount underflow and type confusion in shiftfs Tested on Ubuntu 19.10, kernel "5.3.0-19-generic 20-Ubuntu". Ubuntu ships a filesystem "shiftfs" in fs/shiftfs.c in the kernel tree that doesn't exist upstream. This filesystem can be mounted from user namespaces, meaning that this is...
CVE-2018-5733
A denial of service flaw was found in the way dhcpd handled reference counting when processing client requests. A malicious DHCP client could use this flaw to trigger a reference count overflow on the server side, potentially causing dhcpd to crash, by sending large amounts of traffic...
NewStart CGSL MAIN 5.04 : dhcp Multiple Vulnerabilities (NS-SA-2019-0010)
The remote NewStart CGSL host, running version MAIN 5.04, has dhcp packages installed that are affected by multiple vulnerabilities: - An out-of-bound memory access flaw was found in the way dhclient processed a DHCP response packet. A malicious DHCP server could potentially use this flaw to cras...
kernel: l2tp: Race condition between pppol2tp_session_create() and l2tp_eth_create()
A race condition between pppol2tpsessioncreate and l2tpethcreate in net/l2tp/l2tpnetlink.c was found in the Linux kernel. Calling l2tptunnelfind may result in a new tunnel being created with tunnel id of a previously removed tunnel which wouldn't be protected by the reference counter...
Ubuntu 19.04 : Linux kernel vulnerabilities (USN-4069-1)
It was discovered that an integer overflow existed in the Linux kernel when reference counting pages, leading to potential use-after-free issues. A local attacker could use this to cause a denial of service system crash or possibly execute arbitrary code. CVE-2019-11487 Jann Horn discovered that ...
EulerOS Virtualization 3.0.1.0 : dhcp (EulerOS-SA-2019-1443)
According to the versions of the dhcp packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - ISC DHCP 4.x before 4.1-ESV-R12-P1, 4.2.x, and 4.3.x before 4.3.3-P1 allows remote attackers to cause a denial of service applicati...
Oracle Linux 7 : kernel (ELSA-2019-0818)
The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-0818 advisory. - kvm kvm: fix kvmioctlcreatedevice reference counting Paolo Bonzini 1671922 1671923 CVE-2019-6974 - kvm KVM: nVMX: unconditionally cancel preemption...
PT-2022-4312 · Systemd +7 · Systemd +7
Name of the Vulnerable Software and Affected Versions: systemd affected versions not specified Description: A use-after-free issue was found in systemd due to the on stream io function and dns stream complete function in 'resolved-dns-stream.c' not incrementing the reference counting for the...
Race condition
In the Linux kernel before 4.20.8, kvmioctlcreatedevice in virt/kvm/kvmmain.c mishandles reference counting because of a race condition, leading to a use-after-free...
