CVSS: 7.5EPSS: 0%CPEs: 41EXPL: 0CVE-2021-3695 – grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap
https://notcve.org/view.php?id=CVE-2021-3695
A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12. Una imagen PNG en escala de grises de 16 bits diseñada puede conllevar a una escritura fuera de límites en el área de la pila. • https://bugzilla.redhat.com/show_bug.cgi?id=1991685 https://security.gentoo.org/glsa/202209-12 https://security.netapp.com/advisory/ntap-20220930-0001 https://access.redhat.com/security/cve/CVE-2021-3695 • CWE-787: Out-of-bounds Write •
CVSS: 6.9EPSS: 0%CPEs: 40EXPL: 0CVE-2021-3696 – grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling
https://notcve.org/view.php?id=CVE-2021-3696
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12. Puede producirse una escritura fuera de límites de la pila durante el manejo de las tablas Huffman en el lector PNG. • https://bugzilla.redhat.com/show_bug.cgi?id=1991686 https://security.gentoo.org/glsa/202209-12 https://security.netapp.com/advisory/ntap-20220930-0001 https://access.redhat.com/security/cve/CVE-2021-3696 • CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 0%CPEs: 39EXPL: 0CVE-2021-3697 – grub2: Crafted JPEG image can lead to buffer underflow write in the heap
https://notcve.org/view.php?id=CVE-2021-3697
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12. Una imagen JPEG diseñada puede conllevar que el lector de JPEG desborde su puntero de datos, permitiendo que los datos controlados por el usuario sean escritos en la pila. • https://bugzilla.redhat.com/show_bug.cgi?id=1991687 https://security.gentoo.org/glsa/202209-12 https://security.netapp.com/advisory/ntap-20220930-0001 https://access.redhat.com/security/cve/CVE-2021-3697 • CWE-787: Out-of-bounds Write •
CVSS: 7.8EPSS: 12%CPEs: 59EXPL: 32CVE-2022-0847 – Linux Kernel Privilege Escalation Vulnerability
https://notcve.org/view.php?id=CVE-2022-0847
A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system. Se ha encontrado un fallo en la forma en que el miembro "flags" de la estructura del nuevo búfer de la tubería carecía de la inicialización apropiada en las funciones copy_page_to_iter_pipe y push_pipe en el kernel de Linux y, por tanto, podía contener valores obsoletos. Un usuario local no privilegiado podía usar este fallo para escribir en páginas de la caché de páginas respaldadas por archivos de sólo lectura y así escalar sus privilegios en el sistema Linux versions 4.20 and above have an issue where ktls writes into spliced readonly pages. Linux kernel contains an improper initialization vulnerability where an unprivileged local user could escalate their privileges on the system. • https://www.exploit-db.com/exploits/50808 https://github.com/Arinerron/CVE-2022-0847-DirtyPipe-Exploit https://github.com/AlexisAhmed/CVE-2022-0847-DirtyPipe-Exploits https://github.com/r1is/CVE-2022-0847 https://github.com/bbaranoff/CVE-2022-0847 https://github.com/Al1ex/CVE-2022-0847 https://github.com/antx-code/CVE-2022-0847 https://github.com/basharkey/CVE-2022-0847-dirty-pipe-checker https://github.com/knqyf263/CVE-2022-0847 https://github.com/chenaotian/CVE-2022- • CWE-665: Improper Initialization CWE-909: Missing Initialization of Resource •
CVSS: 9.0EPSS: 0%CPEs: 60EXPL: 2CVE-2022-0435 – kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS
https://notcve.org/view.php?id=CVE-2022-0435
A stack overflow flaw was found in the Linux kernel's TIPC protocol functionality in the way a user sends a packet with malicious content where the number of domain member nodes is higher than the 64 allowed. This flaw allows a remote user to crash the system or possibly escalate their privileges if they have access to the TIPC network. Se ha encontrado un fallo de desbordamiento de pila en la funcionalidad del protocolo TIPC del kernel de Linux en la forma en que un usuario envía un paquete con contenido malicioso cuando el número de nodos miembros del dominio es superior a los 64 permitidos. Este fallo permite a un usuario remoto bloquear el sistema o posiblemente escalar sus privilegios si presenta acceso a la red TIPC A stack overflow flaw was found in the Linux kernel’s TIPC protocol functionality in the way a user sends a packet with malicious content where the number of domain member nodes is higher than the 64 allowed. This flaw allows a remote user to crash the system or possibly escalate their privileges if they have access to the TIPC network. • https://github.com/wlswotmd/CVE-2022-0435 https://bugzilla.redhat.com/show_bug.cgi?id=2048738 https://security.netapp.com/advisory/ntap-20220602-0001 https://www.openwall.com/lists/oss-security/2022/02/10/1 https://access.redhat.com/security/cve/CVE-2022-0435 • CWE-787: Out-of-bounds Write •