Date: Thu, 16 Apr 2009 15:19:44 +0800 From: Eugene Teo <eugene@...hat.com> To: oss-security@...ts.openwall.com CC: "Steven M. Christey" <coley@...us.mitre.org> Subject: CVE request: kernel: 'kill sig -1' must only apply to caller's PID namespace I came across this while reviewing some older upstream patches. Apparently, it was possible to run kill <sig> -1 to kill processes in all PID namespaces, and break the isolation of namespaces. The expected behaviour for this is to only kill processes in its own hierarchy. The fix uses task_pid_vnr() to check if the process is outside of the caller's namespace before killing. PID namespaces was merged in 2.6.24. References: http://lwn.net/Articles/259217/ https://bugzilla.redhat.com/show_bug.cgi?id=496031 http://git.kernel.org/linus/d25141a818383b3c3b09f065698c544a7a0ec6e7 Thanks, Eugene -- Eugene Teo / Red Hat Security Response Team
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