Date: Wed, 13 Aug 2014 16:08:04 +0000 From: Sven Kieske <S.Kieske@...twald.de> To: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com> Subject: Re: CVE Request: ro bind mount bypass using user namespaces Am 12.08.2014 23:48, schrieb Kenton Varda: > Due to a bug in the Linux kernel's implementation of remount, on systems > with unprivileged user namespaces enabled, it is possible for an > unprivileged user to gain write access to any visible read-only bind mount. > It is also possible to bypass flags like nodev, nosuid, and noexec. Hi, does someone happen to know in which released kernel version this bug got introduced? Was it always there since remounting of bind mounts was possible? according to debian this at least affects 2.6.32 kernels in oldstable: https://security-tracker.debian.org/tracker/CVE-2014-5206 https://security-tracker.debian.org/tracker/CVE-2014-5207 Sadly I can't find any other public available bugtracker from redhat, gentoo etc. who track these. -- Mit freundlichen Grüßen / Regards Sven Kieske Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
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