Linux - 'kvm_ioctl_create_device()' NULL Pointer Dereference

kvmioctlcreatedevice contains the following code: dev = kzallocsizeofdev, GFPKERNEL; if !dev return -ENOMEM; dev-ops = ops; dev-kvm = kvm; mutexlock&kvm-lock; ret = ops-createdev, cd-type; if ret lock; kfreedev; return ret; listadd&dev-vmnode, &kvm-devices; mutexunlock&kvm-lock; if ops-init...

Lua 5.3.5 - 'debug.upvaluejoin' Use After Free

Exploit Title: Lua 5.3.5 Exploit Author: Fady Mohamed Osman https://twitter.com/fadyothman Exploit-db : http://www.exploit-db.com/author/?a=2986 Blog : https://blog.fadyothman.com/ Date: Jan. 10th 2019 Vendor Homepage: https://www.lua.org/ Software Link: https://www.lua.org/ftp/lua-5.3.5.tar.gz...

OracleVM 3.4 : xen (OVMSA-2018-0039)

The remote OracleVM system is missing necessary patches to address critical security updates : - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=b68fb6eb2d74ac16bb1e733c5fe5c9d9622b0838 - BUILDINFO: QEMU upstream...

kernel: memory leak when merging buffers in SCSI IO vectors

It was found that in the Linux kernel through v4.14-rc5, biomapuseriov and biounmapuser in 'block/bio.c' do unbalanced pages refcounting if IO vector has small consecutive buffers belonging to the same page. bioaddpcpage merges them into one, but the page reference is never dropped, causing a...

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...

improper x86 shadow mode refcount error handling

ISSUE DESCRIPTION Pages being used to run x86 guests in shadow mode are reference counted to track their uses. When another reference cannot be acquired, the corresponding page table entry must not be inserted. Due to incorrect error handling, this constraint could be violated. IMPACT A malicious...

broken x86 shadow mode refcount overflow check

ISSUE DESCRIPTION Pages being used to run x86 guests in shadow mode are reference counted to track their uses. Unfortunately the overflow check when trying to obtain a new reference used a mask one bit wider than the reference count actually is, rendering the entire check ineffective. IMPACT A...

DEBIAN-CVE-2014-0143

Multiple integer overflows in the block drivers in QEMU, possibly before 2.0.0, allow local users to cause a denial of service crash via a crafted catalog size in 1 the parallelsopen function in block/parallels.c or 2 bochsopen function in bochs.c, a large L1 table in the 3 qcow2snapshotloadtmp i...

Design/Logic Flaw

The cookie feature in the packet action API implementation in net/sched/actapi.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service uninitialized memory access and refcount underflow, and system hang or crash or possib...

CVE-2017-7979

The cookie feature in the packet action API implementation in net/sched/actapi.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service uninitialized memory access and refcount underflow, and system hang or crash or possib...

The use of the Linux kernel in Use-After-Free（UAF）vulnerability to mention the right-vulnerability warning-the black bar safety net

Last month broke the CVE-2 0 1 6-0 7 2 8 （local mention the right loopholes so everyone's attention once again focused on the linux kernel security. And CVE-2 0 1 5-3 6 3 6, The CVE-2 0 1 5-7 3 1 2, The CVE-2 0 1 4-2 8 5 1, CVE-2 0 1 6-0 7 2 8 is a Use-After-Free（UAF types of vulnerabilities. We...

Exploit for CVE-2016-0728

CVE-2016-0728 testbed This repository contains a test program...

Linux Kernel REFCOUNT Overflow / Use-After-Free

Exploit Title: Linux kernel REFCOUNT overflow/Use-After-Free in keyrings Date: 19/1/2016 Exploit Author: Perception Point Team CVE : CVE-2016-0728 / CVE-2016-0728 local root exploit modified by Federico Bento to read kernel symbols from /proc/kallsyms props to grsecurity/PaX for preventing this i...

Linux Kernel 4.4.1 - REFCOUNT Overflow Use-After-Free in Keyrings Local Privilege Escalation (2)

/ Exploit Title: Linux kernel REFCOUNT overflow/Use-After-Free in keyrings Date: 19/1/2016 Exploit Author: Perception Point Team CVE : CVE-2016-0728 / / CVE-2016-0728 local root exploit modified by Federico Bento to read kernel symbols from /proc/kallsyms props to grsecurity/PaX for preventing th...

Linux Kernel 4.4.1 - REFCOUNT Overflow Use-After-Free in Keyrings Local Privilege Escalation (1)

Linux Kernel 4.4.1 - REFCOUNT Overflow Use-After-Free in Keyrings Local Privilege Escalation 1 / Exploit Title: Linux kernel REFCOUNT overflow/Use-After-Free in keyrings Date: 19/1/2016 Exploit Author: Perception Point Team CVE : CVE-2016-0728 / / $ gcc cve20160728.c -o cve20160728 -lkeyutils -Wa...

Linux Kernel 4.4.1 - REFCOUNT Overflow/Use-After-Free in Keyrings Privilege Escalation (1)

Exploit for linux platform in category local exploits / Exploit Title: Linux kernel REFCOUNT overflow/Use-After-Free in keyrings Date: 19/1/2016 Exploit Author: Perception Point Team CVE : CVE-2016-0728 / / $ gcc cve20160728.c -o cve20160728 -lkeyutils -Wall / / $ ./cve2016072 PPKEY / / EDB-Note:...

Linux Kernel 4.4.1 - REFCOUNT Overflow Use-After-Free in Keyrings Local Privilege Escalation (1)

/ Exploit Title: Linux kernel REFCOUNT overflow/Use-After-Free in keyrings Date: 19/1/2016 Exploit Author: Perception Point Team CVE : CVE-2016-0728 / / $ gcc cve20160728.c -o cve20160728 -lkeyutils -Wall / / $ ./cve2016072 PPKEY / / EDB-Note: More information...

Oracle: Security Advisory (ELSA-2008-0885)

The remote host is missing an update for the SPDX-FileCopyrightText: 2015 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: vfs: refcount issues during unmount on symlink

A flaw was found in the way the Linux kernel's VFS subsystem handled reference counting when performing unmount operations on symbolic links. A local, unprivileged user could use this flaw to exhaust all available memory on the system or, potentially, trigger a use-after-free error, resulting in ...

kernel: vfs: refcount issues during unmount on symlink

A flaw was found in the way the Linux kernel's VFS subsystem handled reference counting when performing unmount operations on symbolic links. A local, unprivileged user could use this flaw to exhaust all available memory on the system or, potentially, trigger a use-after-free error, resulting in ...