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View Full Version : USN-661-1: Linux kernel regression



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October 30th, 2008, 09:20 PM
Description:
================================================== =========Ubuntu Security Notice USN-661-1 October 30, 2008linux regressionhttps://launchpad.net/bugs/264019============================================ ===============A security issue affects the following Ubuntu releases:Ubuntu 8.10This advisory also applies to the corresponding versions ofKubuntu, Edubuntu, and Xubuntu.The problem can be corrected by upgrading your system to thefollowing package versions:Ubuntu 8.10: linux-image-2.6.27-7-generic 2.6.27-7.15 linux-image-2.6.27-7-server 2.6.27-7.15 linux-image-2.6.27-7-virtual 2.6.27-7.15 procps 1:3.2.7-9ubuntu2.1After a standard system upgrade you need to reboot your computer toeffect the necessary changes.Details follow:Version 2.6.27 of the Linux kernel changed the order of options inTCP headers. While this change was RFC-compliant, it was found thatsome old routers and consumer DSL modems would not route traffic forthese systems when TCP timestamps were enabled. As a workaround, TCPtimestamps were disabled via sysctl.This update restores the previous ordering of TCP options, andreenables TCP timestamps. We apologize for the inconvenience.





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