Date: Thu, 17 Dec 2015 14:39:58 -0800 From: John Johansen <john.johansen@...onical.com> To: oss-security@...ts.openwall.com Subject: CVE Request: Linux kernel: privilege escalation in user namespaces Hi, I haven't seen CVE request for this one yet so, Jann Horn reported a privilege escalation in user namespaces to the lkml mailing list https://lkml.org/lkml/2015/12/12/259 if a root-owned process wants to enter a user namespace for some reason without knowing who owns it and therefore can't change to the namespace owner's uid and gid before entering, as soon as it has entered the namespace, the namespace owner can attach to it via ptrace and thereby gain access to its uid and gid.
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