|Bugzilla:||652508: CVE-2010-4165 kernel: possible kernel oops from user MSS|
The MITRE CVE dictionary describes this issue as:
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.
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 and 5 as they did not backport the upstream commit that introduced the issue. This has been addressed in Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0283.html and https://rhn.redhat.com/errata/RHSA-2011-0330.html.
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Red Hat security errata
|MRG Grid for RHEL 5 Server (kernel-rt)||RHSA-2011:0330||March 10, 2011|
|Red Hat Enterprise Linux version 6 (kernel)||RHSA-2011:0283||February 22, 2011|
Red Hat would like to thank Steve Chen for reporting this issue.
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For clarification or corrections please contact the Red Hat Security Response Team.