CVSS: 7.0EPSS: 0%CPEs: 104EXPL: 0CVE-2020-15702 – TOCTOU in apport
https://notcve.org/view.php?id=CVE-2020-15702
TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234. La vulnerabilidad de Condición de Carrera TOCTOU en apport permite a un atacante local escalar privilegios y ejecutar código arbitrario. • https://usn.ubuntu.com/4449-1 https://usn.ubuntu.com/4449-2 https://www.zerodayinitiative.com/advisories/ZDI-20-979 • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition •
CVSS: 6.7EPSS: 0%CPEs: 11EXPL: 0CVE-2020-14344 – libX11: Heap overflow in the X input method client
https://notcve.org/view.php?id=CVE-2020-14344
An integer overflow leading to a heap-buffer overflow was found in The X Input Method (XIM) client was implemented in libX11 before version 1.6.10. As per upstream this is security relevant when setuid programs call XIM client functions while running with elevated privileges. No such programs are shipped with Red Hat Enterprise Linux. Se encontró un desbordamiento de enteros conllevando a un desbordamiento del búfer de la pila en el cliente X Input Method (XIM), se implementó en libX11 anterior a la versión 1.6.10. Según aguas arriba, esto es relevante para la seguridad cuando los programas setuid llaman a las funciones del cliente XIM mientras se ejecutan con privilegios elevados. • http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00014.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00015.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00024.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00031.html https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14344 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VDDSAYV7XGNRCXE7HCU23645MG74OFF https://lists.fedoraproject.org/ar • CWE-190: Integer Overflow or Wraparound •
CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2020-14347 – X.Org Server Pixel Data Uninitialized Memory Information Disclosure Vulnerability
https://notcve.org/view.php?id=CVE-2020-14347
A flaw was found in the way xserver memory was not properly initialized. This could leak parts of server memory to the X client. In cases where Xorg server runs with elevated privileges, this could result in possible ASLR bypass. Xorg-server before version 1.20.9 is vulnerable. Se encontró un fallo en la manera en que la memoria de xserver no fue inicializada apropiadamente. • http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00066.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00075.html https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14347 https://lists.debian.org/debian-lts-announce/2020/08/msg00057.html https://lists.x.org/archives/xorg-announce/2020-July/003051.html https://security.gentoo.org/glsa/202012-01 https://usn.ubuntu.com/4488-1 https://usn.ubuntu.com/4488-2 https://www.debian.org/security&#x • CWE-665: Improper Initialization •
CVSS: 4.3EPSS: 0%CPEs: 21EXPL: 0CVE-2020-16166 – kernel: information exposure in drivers/char/random.c and kernel/time/timer.c
https://notcve.org/view.php?id=CVE-2020-16166
The Linux kernel through 5.7.11 allows remote attackers to make observations that help to obtain sensitive information about the internal state of the network RNG, aka CID-f227e3ec3b5c. This is related to drivers/char/random.c and kernel/time/timer.c. El kernel de Linux versiones hasta 5.7.11, permite a atacantes remotos realizar observaciones que ayudan a obtener información confidencial sobre el estado interno de la red RNG, también se conoce como CID-f227e3ec3b5c. Esto está relacionado con los archivos drivers/char/random.c y kernel/time/timer.c A flaw was found in the Linux kernel. The generation of the device ID from the network RNG internal state is predictable. • http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00047.html https://arxiv.org/pdf/2012.07432.pdf https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f227e3ec3b5cad859ad15666874405e8c1bbc1d4 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c51f8f88d705e06bd696d7510aff22b33eb8e638 https://github.com/torvalds/linux/commit/f227e3ec3b5cad859ad15666874405e8c1bbc1d4 https://lists.debian& • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-330: Use of Insufficiently Random Values •
CVSS: 6.4EPSS: 0%CPEs: 32EXPL: 0CVE-2020-15705 – GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shim
https://notcve.org/view.php?id=CVE-2020-15705
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions. GRUB2 presenta un fallo al comprobar la firma del kernel cuando se inicia directamente sin cuña, permitiendo que el arranque seguro sea omitido. Esto solo afecta a los sistemas en los que el certificado de firma del kernel ha sido importado directamente a la base de datos de arranque seguro y la imagen de GRUB es iniciada directamente sin el uso de cuña. • http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html http://ubuntu.com/security/notices/USN-4432-1 http://www.openwall.com/lists/oss-security/2020/07/29/3 http://www.openwall.com/lists/oss-security/2021/03/02/3 http://www.openwall.com/lists/oss-security/2021/09/17/2 http://www.openwall.com/lists/oss-security/2021/09/17/4 http://www.openwall.com/lists/oss-security&#x • CWE-347: Improper Verification of Cryptographic Signature CWE-440: Expected Behavior Violation •