CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2021-3428 – kernel: integer overflow in ext4_es_cache_extent
https://notcve.org/view.php?id=CVE-2021-3428
A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is corrupted in a crafted ext4 filesystem in fs/ext4/extents.c in ext4_es_cache_extent. Fabricating an integer overflow, A local attacker with a special user privilege may cause a system crash problem which can lead to an availability threat. Se ha encontrado un fallo en el kernel de Linux. Es identificado un problema de denegación de servicio si es corrompido un árbol de extensiones en un sistema de archivos ext4 diseñado en el archivo fs/ext4/extents.c en la función ext4_es_cache_extent. • https://bugzilla.redhat.com/show_bug.cgi?id=1972621 https://ubuntu.com/security/CVE-2021-3428 https://www.openwall.com/lists/oss-security/2021/03/17/1 https://access.redhat.com/security/cve/CVE-2021-3428 https://bugzilla.redhat.com/show_bug.cgi?id=1936786 • CWE-190: Integer Overflow or Wraparound •
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: 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: 4.3EPSS: 0%CPEs: 34EXPL: 0CVE-2020-26558 – bluez: Passkey Entry protocol of the Bluetooth Core is vulnerable to an impersonation attack
https://notcve.org/view.php?id=CVE-2020-26558
Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication procedure) by reflection of the public key and the authentication evidence of the initiating device, potentially permitting this attacker to complete authenticated pairing with the responding device using the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit at a time. El emparejamiento seguro de Bluetooth LE y BR/EDR en Bluetooth Core Specification versiones 2.1 hasta 5.2, puede permitir a un atacante de tipo man-in-the-middle cercano identificar el Passkey usada durante el emparejamiento (en el procedimiento de autenticación de Passkey) mediante el reflejo de la clave pública y la evidencia de autenticació del dispositivo de inicio, potencialmente permitiendo a este atacante completar el emparejamiento autenticado con el dispositivo que responde usando la contraseña correcta para la sesión de emparejamiento. La metodología de ataque determina el valor de la Clave un bit a la vez A vulnerability was found in the bluez, where Passkey Entry protocol used in Secure Simple Pairing (SSP), Secure Connections (SC) and LE Secure Connections (LESC) of the Bluetooth Core Specification is vulnerable to an impersonation attack where an active attacker can impersonate the initiating device without any previous knowledge. • https://kb.cert.org/vuls/id/799380 https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html https://lists.debian.org/debian-lts-announce/2021/06/msg00022.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NSS6CTGE4UGTJLCOZOASDR3T3SLL6QJZ https://security.gentoo.org/glsa/202209-16 https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security ht • CWE-287: Improper Authentication •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 2CVE-2021-33033 – kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c
https://notcve.org/view.php?id=CVE-2021-33033
The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads to writing an arbitrary value. El kernel de Linux versiones anteriores a 5.11.14, presenta un uso de la memoria previamente liberada en una función cipso_v4_genopt en el archivo net/ipv4/cipso_ipv4.c, porque el recuento de CIPSO y CALIPSO para las definiciones DOI es manejado inapropiadamente, también se conoce como CID-ad5d07f4a9cd. Esto conlleva a escribir un valor arbitrario A flaw use-after-free in the Linux kernel CIPSO network packet labeling protocol functionality was found in the way user open local network connection with the usage of the security labeling that is IP option number 134. A local user could use this flaw to crash the system or possibly escalate their privileges on the system. • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt https://syzkaller.appspot.com/bug?id=96e7d345 • CWE-416: Use After Free •