CVSS: 8.8EPSS: 0%CPEs: 14EXPL: 2CVE-2021-4154 – kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout
https://notcve.org/view.php?id=CVE-2021-4154
A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system. Se encontró un defecto de uso de memoria previamente liberada en la función cgroup1_parse_param en el archivo kernel/cgroup/cgroup-v1.c en el analizador cgroup v1 del kernel de Linux. Un atacante local con un privilegio de usuario podría causar una escalada de privilegios al explotar el parámetro de syscall fsconfig, conllevando a una ruptura del contenedor y una denegación de servicio en el sistema • https://github.com/Markakd/CVE-2021-4154 https://github.com/veritas501/CVE-2021-4154 https://bugzilla.redhat.com/show_bug.cgi?id=2034514 https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b0462726e7ef281c35a7a4ae33e93ee2bc9975b https://security.netapp.com/advisory/ntap-20220225-0004 https://access.redhat.com/security/cve/CVE-2021-4154 • CWE-416: Use After Free •
CVSS: 8.4EPSS: 0%CPEs: 20EXPL: 7CVE-2022-0185 – Linux Kernel Heap-Based Buffer Overflow Vulnerability
https://notcve.org/view.php?id=CVE-2022-0185
A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system. Se ha encontrado un fallo de desbordamiento de búfer en la región heap de la memoria en la forma en que la función legacy_parse_param de la funcionalidad Filesystem Context del kernel de Linux verifica la longitud de los parámetros suministrados. Un usuario local no privilegiado (en caso de tener habilitados los espacios de nombres de usuario no privilegiado, de lo contrario necesita el privilegio CAP_SYS_ADMIN) capaz de abrir un sistema de archivos que no soporta la API Filesystem Context (y por lo tanto los fallbacks a la administración de legado) podría usar este fallo para escalar sus privilegios en el sistema Linux kernel contains a heap-based buffer overflow vulnerability in the legacy_parse_param function in the Filesystem Context functionality. This allows an attacker to open a filesystem that does not support the Filesystem Context API and ultimately escalate privileges. • https://github.com/Crusaders-of-Rust/CVE-2022-0185 https://github.com/chenaotian/CVE-2022-0185 https://github.com/veritas501/CVE-2022-0185-PipeVersion https://github.com/featherL/CVE-2022-0185-exploit https://github.com/dcheng69/CVE-2022-0185-Case-Study https://github.com/khaclep007/CVE-2022-0185 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2 https://security.netapp.com/advisory/ntap-20220225-0003 https://www.openwall.com/lists/o • CWE-190: Integer Overflow or Wraparound CWE-191: Integer Underflow (Wrap or Wraparound) •
CVSS: 9.8EPSS: 4%CPEs: 18EXPL: 3CVE-2021-43267 – kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type
https://notcve.org/view.php?id=CVE-2021-43267
An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type. Se ha detectado un problema en el archivo net/tipc/crypto.c en el kernel de Linux versiones anteriores a 5.14.16. La funcionalidad Transparent Inter-Process Communication (TIPC) permite a atacantes remotos explotar una comprobación insuficiente de los tamaños suministrados por el usuario para el tipo de mensaje MSG_CRYPTO A flaw was discovered in the cryptographic receive code in the Linux kernel's implementation of transparent interprocess communication. An attacker, with the ability to send TIPC messages to the target, can corrupt memory and escalate privileges on the target system. • https://github.com/zzhacked/CVE-2021-43267 https://github.com/DarkSprings/CVE-2021-43267-POC http://www.openwall.com/lists/oss-security/2022/02/10/1 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16 https://github.com/torvalds/linux/commit/fa40d9734a57bcbfa79a280189799f76c88f7bb0 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVWL7HZV5T5OEKJPO2D67RMFMKBBXGGB https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message&# • CWE-20: Improper Input Validation CWE-1284: Improper Validation of Specified Quantity in Input •
CVSS: 8.8EPSS: 0%CPEs: 76EXPL: 1CVE-2021-3656 – kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)
https://notcve.org/view.php?id=CVE-2021-3656
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "virt_ext" field, this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. Se ha encontrado un fallo en el código AMD de KVM para soportar la virtualización anidada SVM. • https://github.com/rami08448/CVE-2021-3656-Demo https://bugzilla.redhat.com/show_bug.cgi?id=1983988 https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=c7dfa4009965a9b2d7b329ee970eb8da0d32f0bc https://github.com/torvalds/linux/commit/c7dfa4009965a9b2d7b329ee970eb8da0d32f0bc https://www.openwall.com/lists/oss-security/2021/08/16/1 https://access.redhat.com/security/cve/CVE-2021-3656 • CWE-862: Missing Authorization •
CVSS: 8.8EPSS: 0%CPEs: 15EXPL: 1CVE-2021-3653 – kernel: SVM nested virtualization issue in KVM (AVIC support)
https://notcve.org/view.php?id=CVE-2021-3653
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7. • http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html https://bugzilla.redhat.com/show_bug.cgi?id=1983686 https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html https://www.openwall.com/lists/oss-security/2021/08/16/1 https://access.redhat.com/security/cve/CVE-2021-3653 • CWE-862: Missing Authorization •