CVSS: 7.8EPSS: 17%CPEs: 18EXPL: 18CVE-2023-4911 – GNU C Library Buffer Overflow Vulnerability
https://notcve.org/view.php?id=CVE-2023-4911
A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges. Se descubrió un desbordamiento del búfer en el cargador dinámico ld.so de la librería GNU C mientras se procesaba la variable de entorno GLIBC_TUNABLES. Este problema podría permitir que un atacante local utilice variables de entorno GLIBC_TUNABLES manipuladas con fines malintencionados al iniciar archivos binarios con permiso SUID para ejecutar código con privilegios elevados. Dubbed Looney Tunables, Qualys discovered a buffer overflow vulnerability in the glibc dynamic loader's processing of the GLIBC_TUNABLES environment variable. • https://github.com/leesh3288/CVE-2023-4911 https://github.com/ruycr4ft/CVE-2023-4911 https://github.com/guffre/CVE-2023-4911 https://github.com/NishanthAnand21/CVE-2023-4911-PoC https://github.com/RickdeJager/CVE-2023-4911 https://github.com/hadrian3689/looney-tunables-CVE-2023-4911 https://github.com/Green-Avocado/CVE-2023-4911 https://github.com/xiaoQ1z/CVE-2023-4911 https://github.com/Diego-AltF4/CVE-2023-4911 https://github.com/KernelKrise/CVE-2023-4911 https:/&# • CWE-122: Heap-based Buffer Overflow CWE-787: Out-of-bounds Write •
CVSS: 5.5EPSS: 0%CPEs: 21EXPL: 0CVE-2021-3659 – kernel: NULL pointer dereference in llsec_key_alloc() in net/mac802154/llsec.c
https://notcve.org/view.php?id=CVE-2021-3659
A NULL pointer dereference flaw was found in the Linux kernel’s IEEE 802.15.4 wireless networking subsystem in the way the user closes the LR-WPAN connection. This flaw allows a local user to crash the system. The highest threat from this vulnerability is to system availability. Se ha encontrado un fallo de desreferencia de puntero NULL en el subsistema de red inalámbrica IEEE versión 802.15.4 del kernel de Linux en la forma en que el usuario cierra la conexión LR-WPAN. Este fallo permite a un usuario local bloquear el sistema. • https://access.redhat.com/security/cve/CVE-2021-3659 https://bugzilla.redhat.com/show_bug.cgi?id=1975949 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 • CWE-252: Unchecked Return Value CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 34EXPL: 0CVE-2021-3669 – kernel: reading /proc/sysvipc/shm does not scale with large shared memory segment counts
https://notcve.org/view.php?id=CVE-2021-3669
A flaw was found in the Linux kernel. Measuring usage of the shared memory does not scale with large shared memory segment counts which could lead to resource exhaustion and DoS. Se ha encontrado un fallo en el kernel de Linux. La medición del uso de la memoria compartida no escala con grandes recuentos de segmentos de memoria compartida, lo que podría conllevar a el agotamiento de recursos y el DoS. • https://access.redhat.com/security/cve/CVE-2021-3669 https://bugzilla.redhat.com/show_bug.cgi?id=1980619 https://bugzilla.redhat.com/show_bug.cgi?id=1986473 https://security-tracker.debian.org/tracker/CVE-2021-3669 • CWE-400: Uncontrolled Resource Consumption CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 7.8EPSS: 0%CPEs: 54EXPL: 1CVE-2022-1011 – kernel: FUSE allows UAF reads of write() buffers, allowing theft of (partial) /etc/shadow hashes
https://notcve.org/view.php?id=CVE-2022-1011
A use-after-free flaw was found in the Linux kernel’s FUSE filesystem in the way a user triggers write(). This flaw allows a local user to gain unauthorized access to data from the FUSE filesystem, resulting in privilege escalation. Se ha encontrado un fallo de uso después de libre en el sistema de archivos FUSE del kernel de Linux en la forma en que un usuario activa write(). Este defecto permite a un usuario local obtener acceso no autorizado a los datos del sistema de archivos FUSE, lo que resulta en una escalada de privilegios Linux suffers from a vulnerability where FUSE allows use-after-free reads of write() buffers, allowing theft of (partial) /etc/shadow hashes. • https://github.com/xkaneiki/CVE-2022-1011 https://bugzilla.redhat.com/show_bug.cgi?id=2064855 https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git/commit/?h=for-next https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html https://www.debian.org/security/2022/dsa-5173 https://www.oracle.com/security-alerts/cpujul2022.html https://access.redhat.com/security/cve/CVE-2022-1011 • CWE-416: Use After Free •
CVSS: 7.8EPSS: 0%CPEs: 40EXPL: 0CVE-2022-0516 – kernel: missing check in ioctl allows kernel memory read/write
https://notcve.org/view.php?id=CVE-2022-0516
A vulnerability was found in kvm_s390_guest_sida_op in the arch/s390/kvm/kvm-s390.c function in KVM for s390 in the Linux kernel. This flaw allows a local attacker with a normal user privilege to obtain unauthorized memory write access. This flaw affects Linux kernel versions prior to 5.17-rc4. Se encontró una vulnerabilidad en la función kvm_s390_guest_sida_op en el archivo arch/s390/kvm/kvm-s390.c en KVM para s390 en el kernel de Linux. Este fallo permite a un atacante local con un privilegio de usuario normal obtener un acceso de escritura en memoria no autorizado. • https://bugzilla.redhat.com/show_bug.cgi?id=2050237 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=09a93c1df3eafa43bcdfd7bf837c574911f12f55 https://security.netapp.com/advisory/ntap-20220331-0009 https://www.debian.org/security/2022/dsa-5092 https://access.redhat.com/security/cve/CVE-2022-0516 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-201: Insertion of Sensitive Information Into Sent Data •