TCP_MAXSEG (MSS) Value Restriction Vulnerability in Linux Kernel

CVE-2010-4165 · MEDIUM Severity

AV:L/AC:L/AU:N/C:N/I:N/A:C

The do_tcp_setsockopt function in net/ipv4/tcp.c in the Linux kernel before 2.6.37-rc2 does not properly restrict TCP_MAXSEG (aka MSS) values, which allows local users to cause a denial of service (OOPS) via a setsockopt call that specifies a small value, leading to a divide-by-zero error or incorrect use of a signed integer.

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