Date: Fri, 20 Apr 2012 08:59:03 +0800 From: Eugene Teo <eugeneteo@...nel.sg> To: Marcus Meissner <meissner@...e.de> Cc: OSS Security List <oss-security@...ts.openwall.com>, security@...nel.org, Sukadev Bhattiprolu <sukadev@...ibm.com>, Serge Hallyn <serge.hallyn@...onical.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, Pavel Emelyanov <xemul@...nvz.org> Subject: Re: CVE request: pid namespace leak in kernel 3.0 and 3.1 On Fri, Apr 20, 2012 at 5:48 AM, Marcus Meissner <meissner@...e.de> wrote: > we had a user, Vadim Ponomarev (ccrssaa at karelia.ru), report a pid > namespace leak caused by vsftpd. > > https://bugzilla.novell.com/show_bug.cgi?id=757783 > > He provided a simple reproducer: [...] > > and checking "cat /proc/slabinfo|grep pid_namespace" > gives 10000 more active slots after running it on 3.0.13 (+SUSE patches) and 3.1.10 (+SUSE patches). > > Running this on 3.2.0 (+SUSE Patches) did not result in more slots, so it was probably > fixed between 3.1 and 3.2 (but someone else cross check perhaps). > > Any idea welcome on which patch fixed this, I tried 1b26c9b334044cff6d1d2698f2be41bc7d9a0864 > but it seems not helping. I tested this with 3.0.25-rt44.57.el6rt.x86_64 yesterday, and I was able to trigger the issue. The process needs to be privileged with CAP_SYS_ADMIN. Eric, besides struct pid_namespace, there is a corresponding struct pid_2 leak. Thanks, Eugene
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