CVSS: 8.3EPSS: 0%CPEs: 26EXPL: 13CVE-2021-22555 – Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE
https://notcve.org/view.php?id=CVE-2021-22555
A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space En el archivo net/netfilter/x_tables.c se ha detectado una escritura fuera de límites en la pila que afecta a Linux desde la versión 2.6.19-rc1. Esto permite a un atacante alcanzar privilegios o causar una denegación de servicio (por medio de corrupción de la memoria de la pila) mediante el espacio de nombres de usuario A flaw was discovered in processing setsockopt IPT_SO_SET_REPLACE (or IP6T_SO_SET_REPLACE) for 32 bit processes on 64 bit systems. This flaw will allow local user to gain privileges or cause a DoS through user name space. This action is usually restricted to root-privileged users but can also be leveraged if the kernel is compiled with CONFIG_USER_NS and CONFIG_NET_NS and the user is granted elevated privileges. • https://www.exploit-db.com/exploits/50135 https://github.com/xyjl-ly/CVE-2021-22555-Exploit https://github.com/veritas501/CVE-2021-22555-PipeVersion https://github.com/pashayogi/CVE-2021-22555 https://github.com/tukru/CVE-2021-22555 https://github.com/letsr00t/CVE-2021-22555 https://github.com/letsr00t/-2021-LOCALROOT-CVE-2021-22555 https://github.com/daletoniris/CVE-2021-22555-esc-priv http://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-Bounds-Write.h • CWE-787: Out-of-bounds Write •
CVSS: 8.7EPSS: 0%CPEs: 22EXPL: 1CVE-2021-22543 – Improper memory handling in Linux KVM
https://notcve.org/view.php?id=CVE-2021-22543
An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation. Se detectó un problema en Linux: KVM mediante del manejo inapropiado de Los vmas VM_IO|VM_PFNMAP en KVM pueden omitir unas comprobaciones RO y puede conllevar a que las páginas sean liberadas mientras el VMM y el invitado aún pueden acceder a ellas. Esto permite a usuarios con la capacidad de iniciar y controlar una máquina virtual leer y escribir páginas aleatorias de memoria y puede resultar en una escalada de privilegios local A flaw was found in the Linux kernel’s KVM implementation, where improper handing of the VM_IO|VM_PFNMAP 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 memory, resulting in local privilege escalation. • http://www.openwall.com/lists/oss-security/2021/06/26/1 https://github.com/google/security-research/security/advisories/GHSA-7wq5-phmq-m584 https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4G5YBUVEPHZYXMKNGBZ3S6INFCTEEL4E https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ROQIXQB7ZAWI3KSGSHR6H5RDUWZI77 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-863: Incorrect Authorization •
CVSS: 8.8EPSS: 0%CPEs: 10EXPL: 2CVE-2021-3490 – Linux kernel eBPF bitwise ops ALU32 bounds tracking
https://notcve.org/view.php?id=CVE-2021-3490
The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e ("bpf: Fix alu32 const subreg bound tracking on bitwise operations") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 ("bpf: Verifier, do explicit ALU32 bounds tracking") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 ("bpf:Fix a verifier failure with xor") ( 5.10-rc1). El seguimiento de los límites de la ALU32 de eBPF para las operaciones por bits (AND, OR y XOR) en el kernel de Linux no actualizaba correctamente los límites de 32 bits, lo que podía convertirse en lecturas y escrituras fuera de los límites en el kernel de Linux y, por tanto, en la ejecución de código arbitrario. Este problema fue corregido a través del commit 049c4e13714e ("bpf: Fix alu32 const subreg bound tracking on bitwise operations") (v5.13-rc4) y retrocedido a los kernels estables en v5.12.4, v5.11.21 y v5.10.37. • https://github.com/pivik271/CVE-2021-3490 http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e https://security.netapp.com/advisory/ntap-20210716-0004 https://ubuntu.com/security/notices/USN-4949-1 https://ubuntu.com/security/notices/USN-4950-1 https://www.openwall.com/lists/oss-security/2021/05/11/11 https:/ • CWE-20: Improper Input Validation CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •
CVSS: 8.8EPSS: 0%CPEs: 13EXPL: 2CVE-2020-12351 – Linux Kernel 5.4 - 'BleedingTooth' Bluetooth Zero-Click Remote Code Execution
https://notcve.org/view.php?id=CVE-2020-12351
Improper input validation in BlueZ may allow an unauthenticated user to potentially enable escalation of privilege via adjacent access. Una comprobación de entrada incorrecta en BlueZ puede permitir a un usuario no autenticado habilitar potencialmente una escalada de privilegios por medio de un acceso adyacente A flaw was found in the way the Linux kernel’s Bluetooth implementation handled L2CAP (Logical Link Control and Adaptation Protocol) packets with A2MP (Alternate MAC-PHY Manager Protocol) CID (Channel Identifier). This flaw allows a remote attacker in an adjacent range to crash the system, causing a denial of service or potentially executing arbitrary code on the system by sending a specially crafted L2CAP packet. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. • https://www.exploit-db.com/exploits/49754 http://packetstormsecurity.com/files/162131/Linux-Kernel-5.4-BleedingTooth-Remote-Code-Execution.html https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00435.html?wapkw=CVE-2020-12351 https://access.redhat.com/security/cve/CVE-2020-12351 https://bugzilla.redhat.com/show_bug.cgi?id=1886521 https://access.redhat.com/security/vulnerabilities/BleedingTooth • CWE-20: Improper Input Validation CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') •
CVSS: 8.8EPSS: 0%CPEs: 52EXPL: 6CVE-2020-8835 – Linux kernel bpf verifier vulnerability
https://notcve.org/view.php?id=CVE-2020-8835
In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780) En el kernel de Linux versiones 5.5.0 y más recientes, el verificador bpf (kernel/bpf/verifier.c) no restringió apropiadamente los límites de registro para operaciones de 32 bits, conllevando a lecturas y escrituras fuera de límites en la memoria del kernel. La vulnerabilidad también afecta a la serie estable de Linux versión 5.4, comenzando con la versión v5.4.7, ya que el commit de introducción fue respaldado en esa derivación. • https://github.com/zilong3033/CVE-2020-8835 https://github.com/digamma-ai/CVE-2020-8835-verification https://github.com/SplendidSky/CVE-2020-8835 https://github.com/Prabhashaka/Exploitation-CVE-2020-8835 https://github.com/johnatag/INF8602-CVE-2020-8835 http://www.openwall.com/lists/oss-security/2021/07/20/1 https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef https://git.kernel.org/pub/scm/linux/kernel/git/torvald • CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •