Date: Fri, 13 Nov 2009 14:39:24 +0800 From: Eugene Teo <eugeneteo@...nel.sg> To: oss-security@...ts.openwall.com CC: "Steven M. Christey" <coley@...us.mitre.org> Subject: CVE request: kernel: bad permissions on megaraid_sas sysfs files The megaraid_sas driver exposes a number of driver attributes in sysfs. Many of these are read-only, just export information from the driver and are world-readable. A couple of attributes are writable and may be used to change the behaviour of the driver (e.g. setting debug logging levels, selecting poll vs. interrupt I/O mode etc). Some of these writable attributes are mistakenly created with world-writable permissions, e.g. dbg_lvl and poll_mode_io. This would allow an unprivileged user to affect kernel driver behaviour and logging level. Upstream made the dbd_lvl permissions more restrictive: http://git.kernel.org/linus/66dca9b8c50b5e59d3bea8b21cee5c6dae6c9c46 The poll_mode_io pseudofile still has world-writable permissions upstream. I'm getting my colleague to submit a patch. https://bugzilla.redhat.com/show_bug.cgi?id=526068 Thanks, Eugene
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