CVSS: 7.8EPSS: 0%CPEs: 22EXPL: 0CVE-2021-33200 – kernel: out-of-bounds reads and writes due to enforcing incorrect limits for pointer arithmetic operations by BPF verifier
https://notcve.org/view.php?id=CVE-2021-33200
kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit. El archivo kernel/bpf/verifier.c en el kernel de Linux versiones hasta 5.12.7, aplica límites incorrectos para operaciones aritméticas de puntero, también se conoce como CID-bb01a1bba579. Esto puede ser abusado para llevar a cabo lecturas y escrituras fuera de límites en la memoria del kernel, conllevando a una escalada local de privilegios a root. • https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d0220f6861d713213b015b582e9f21e5b28d2e0 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a7036191277f9fa68d92f2071ddc38c09b1e5ee5 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb01a1bba579b4b1c5566af24d95f1767859771e https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LR3OKKPHIBGOMHN476CMLW2T7UG53QX https://lists.fedoraproject.org/archives/list/package-announce%40lists.f • CWE-787: Out-of-bounds Write •
CVSS: 5.5EPSS: 0%CPEs: 24EXPL: 2CVE-2020-25673
https://notcve.org/view.php?id=CVE-2020-25673
A vulnerability was found in Linux kernel where non-blocking socket in llcp_sock_connect() leads to leak and eventually hanging-up the system. Se encontró una vulnerabilidad en el kernel de Linux en la que el socket non-blocking en la función llcp_sock_connect() conduce a un filtrado de información y eventualmente bloquea el sistema • http://www.openwall.com/lists/oss-security/2020/11/01/1 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PW3OASG7OEMHANDWBM5US5WKTOC76KMH https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTVACC6PGS6OSD3EYY7FZUAZT2EUMFH5 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VEIEGQXUW37YHZ5MTAZTDCIMHUN26NJS https://security.netapp.com/advisory/ntap-20210702-0008 https://www.openwall.com/lists/oss-security/2020 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 7.8EPSS: 0%CPEs: 31EXPL: 2CVE-2020-25671
https://notcve.org/view.php?id=CVE-2020-25671
A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which might lead to privilege escalations. Se encontró una vulnerabilidad en el Kernel de Linux, donde un filtrado de refcount en la función llcp_sock_connect() causa un uso de la memoria previamente liberada que podría conllevar a una escaladas de privilegios • http://www.openwall.com/lists/oss-security/2020/11/01/1 https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PW3OASG7OEMHANDWBM5US5WKTOC76KMH https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTVACC6PGS6OSD3EYY7FZUAZT2EUMFH5 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.or • CWE-416: Use After Free •
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: 7.5EPSS: 0%CPEs: 25EXPL: 0CVE-2020-25672
https://notcve.org/view.php?id=CVE-2020-25672
A memory leak vulnerability was found in Linux kernel in llcp_sock_connect Se encontró una vulnerabilidad de pérdida de memoria en el kernel de Linux en la función llcp_sock_connect • http://www.openwall.com/lists/oss-security/2020/11/01/1 https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PW3OASG7OEMHANDWBM5US5WKTOC76KMH https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTVACC6PGS6OSD3EYY7FZUAZT2EUMFH5 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.or • CWE-401: Missing Release of Memory after Effective Lifetime •