Out-of-bounds Write Affecting zephyrproject-rtos/zephyr package, versions [,3.7.0-rc2)
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Test your applications- Snyk ID SNYK-UNMANAGED-ZEPHYRPROJECTRTOSZEPHYR-8165332
- published 8 Oct 2024
- disclosed 4 Oct 2024
- credit ekleezg
Introduced: 4 Oct 2024
CVE-2024-6442 Open this link in a new tabHow to fix?
Upgrade zephyrproject-rtos/zephyr to version 3.7.0-rc2 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write through the ascs_cp_rsp_add function due to an unchecked tailroom. An attacker can cause a buffer overflow and potentially execute arbitrary code or disrupt service by sending crafted input that exceeds the buffer limits.
PoC
Set the
CONFIG_BT_L2CAP_TX_MTUparameter to 253, which is the default value as defined in autoconf.h.Set the
num_asesin thereqto a value greater than 85, ensuring that the resulting size exceeds the capacity ofrsp_buf, since 85×3>253.