Unspecified vulnerability in the Apple Mac OS X kernel before 10.4.2 allows remote attackers to cause a denial of service (kernel panic) via a crafted TCP packet, possibly related to source routing or loose source routing.
Apple Mac OS X kernel versions prior to 10.4.2 are vulnerable to a denial-of-service (DoS) attack. A crafted TCP packet can trigger a kernel panic, rendering the system unusable. This vulnerability could be exploited remotely, disrupting critical services and potentially leading to data loss.
Step 1: Packet Crafting: An attacker crafts a malicious TCP packet. The packet's header likely contains specific options or flags that are not handled correctly by the vulnerable kernel. The exact nature of the crafted packet is unspecified in the CVE, but it likely involves manipulating TCP header options related to source routing or loose source routing. Step 2: Packet Transmission: The attacker sends the crafted TCP packet to a target Mac OS X system running a vulnerable kernel version. Step 3: Kernel Processing: The vulnerable kernel receives the packet and attempts to process it. Due to the crafted packet's malformed or unexpected options, the kernel's TCP/IP stack encounters an error. Step 4: Kernel Panic: The error in the TCP/IP stack triggers a kernel panic, causing the system to crash and become unresponsive.
The vulnerability stems from a flaw within the Mac OS X kernel's TCP/IP stack, specifically in how it handles TCP packets, potentially related to source routing or loose source routing. The crafted packet likely exploits a logic error in the kernel's packet processing routines, leading to a crash. The exact root cause is not explicitly stated in the CVE, but the description suggests a problem in how the kernel handles malformed or unexpected TCP header options, potentially leading to a null pointer dereference, memory corruption, or other critical errors that trigger a kernel panic.