CVE-2024-43893
Linux Serial Driver UART Divide By Zero
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
INFO
Published Date :
Aug. 26, 2024, 11:15 a.m.
Last Modified :
Sept. 10, 2024, 6:13 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-43893.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-43893 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-43893 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Sep. 10, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba No Types Assigned https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba Patch Changed Reference Type https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9e No Types Assigned https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9e Patch Changed Reference Type https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24f No Types Assigned https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24f Patch Changed Reference Type https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8 No Types Assigned https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8 Patch Changed Reference Type https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193 No Types Assigned https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193 Patch Changed Reference Type https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49 No Types Assigned https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49 Patch Changed Reference Type https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051 No Types Assigned https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051 Patch Changed Reference Type https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2 No Types Assigned https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2 Patch Added CWE NIST CWE-369 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.19.320 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.282 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.224 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.165 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.105 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.46 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.10.5 *cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 26, 2024
Action Type Old Value New Value Added 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 Added Reference kernel.org https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24f [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9e [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-43893 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-43893
weaknesses.