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CVE-2024-43893

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.3%
Linux•Linux•Versions : <=6.1.*, 2.6.12, 5.15.165, <e3ad503876283ac3fcca922a1bf243ef9eb0b0e2, <e13ba3fe5ee070f8a9dab60029d52b1f61da5051, 0, <3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba, <2.6.12, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, <55b2a5d331a6ceb1c4372945fdb77181265ba24f, <=5.10.*, <=6.6.*, <52b138f1021113e593ee6ad258ce08fe90693a9e, 5.4.282, <=5.4.*, <=4.19.*, <9196e42a3b8eeff1707e6ef769112b4b6096be49, <6eabce6608d6f3440f4c03aa3d3ef50a47a3d193, 5.10.224, 6.1.105, 6.11, <=*, 4.19.320, <=5.15.*, <68dc02f319b9ee54dc23caba742a5c754d1cccc8, 6.6.46, <=6.10.*, 6.10.5

Description

In the Linux kernel, the following vulnerability has been resolved: serial: core: check uartclk for zero to avoid divide by zero Calling ioctl TIOCSSERIAL with an invalid baud_base can result in uartclk being zero, which will result in a divide by zero error in uart_get_divisor(). The check for uartclk being zero in uart_set_info() needs to be done before other settings are made as subsequent calls to ioctl TIOCSSERIAL for the same port would be impacted if the uartclk check was done where uartclk gets set. Oops: divide error: 0000 PREEMPT SMP KASAN PTI RIP: 0010:uart_get_divisor (drivers/tty/serial/serial_core.c:580) Call Trace: <TASK> serial8250_get_divisor (drivers/tty/serial/8250/8250_port.c:2576 drivers/tty/serial/8250/8250_port.c:2589) serial8250_do_set_termios (drivers/tty/serial/8250/8250_port.c:502 drivers/tty/serial/8250/8250_port.c:2741) serial8250_set_termios (drivers/tty/serial/8250/8250_port.c:2862) uart_change_line_settings (./include/linux/spinlock.h:376 ./include/linux/serial_core.h:608 drivers/tty/serial/serial_core.c:222) uart_port_startup (drivers/tty/serial/serial_core.c:342) uart_startup (drivers/tty/serial/serial_core.c:368) uart_set_info (drivers/tty/serial/serial_core.c:1034) uart_set_info_user (drivers/tty/serial/serial_core.c:1059) tty_set_serial (drivers/tty/tty_io.c:2637) tty_ioctl (drivers/tty/tty_io.c:2647 drivers/tty/tty_io.c:2791) __x64_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:907 fs/ioctl.c:893 fs/ioctl.c:893) do_syscall_64 (arch/x86/entry/common.c:52 (discriminator 1) arch/x86/entry/common.c:83 (discriminator 1)) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Rule: add

Gravité et risque d'exploitation

CVE-2024-43893 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.26 %, ce qui la place devant 16.3 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, 2.6.12, 5.15.165, <e3ad503876283ac3fcca922a1bf243ef9eb0b0e2, <e13ba3fe5ee070f8a9dab60029d52b1f61da5051, 0, <3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba, <2.6.12, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, <55b2a5d331a6ceb1c4372945fdb77181265ba24f, <=5.10.*, <=6.6.*, <52b138f1021113e593ee6ad258ce08fe90693a9e, 5.4.282, <=5.4.*, <=4.19.*, <9196e42a3b8eeff1707e6ef769112b4b6096be49, <6eabce6608d6f3440f4c03aa3d3ef50a47a3d193, 5.10.224, 6.1.105, 6.11, <=*, 4.19.320, <=5.15.*, <68dc02f319b9ee54dc23caba742a5c754d1cccc8, 6.6.46, <=6.10.*, 6.10.5) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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