Buffer Overflow in Linux Kernel Affecting Netfilter Conntrack

CVE-2023-53333

What is CVE-2023-53333?

The vulnerability within the Linux kernel's netfilter conntrack subsystem allows for a buffer overflow due to inadequate handling of DCCP packet headers. The function nf_conntrack_dccp_packet fails to properly validate the size of incoming headers before copying them to the stack, potentially leading to out-of-bounds memory access. This security flaw could be exploited by malicious packets, allowing for further attacks or system instability. A fix has been implemented to expand the stack buffer and validate additional packet parameters, reinforcing the security measures for connection tracking.

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