Stack-based buffer overflow in Linux kernel - CVE-2016-8632

Detailed vulnerability description

The vulnerability allows a local user to cause kernel panic or escalate privileges.

The vulnerability exists due to a boundary error during minimum bearer MTU check within the tipc_msg_build() function. A local user can set a very short MTU, trigger stack-based buffer overflow and cause kernel panic or execute arbitrary code on the target system with elevated privileges.

Successful exploitation of the vulnerability may allow an attacker to cause kernel panic or escalate privileges on the system.

How to mitigate CVE-2016-8632

Sources

• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.65
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.37