oss-security - Re: CVE request - kernel: xfs infoleak

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Message-ID: <979245400.58352.1297863982545.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com>
Date: Wed, 16 Feb 2011 08:46:22 -0500 (EST)
From: Josh Bressers <bressers@...hat.com>
To: oss-security@...ts.openwall.com
Cc: "Steven M. Christey" <coley@...us.mitre.org>
Subject: Re: CVE request - kernel: xfs infoleak

----- Original Message -----
> From Dan R0s3nbug5, "The FSGEOMETRY_V1 ioctl (and its compat equivalent)
> calls out to xfs_fs_geometry() with a version number of 3.  This code
> path does not fill in the logsunit member of the passed xfs_fsop_geom_t,
> leading to the leaking of four bytes of uninitialized stack data to
> potentially unprivileged callers. Since all other members are filled in
> all code paths and there are no padding bytes in this structure, it's
> safe to avoid an expensive memset() in favor of just clearing this one
> field."
> 
> https://patchwork.kernel.org/patch/555461/
> https://bugzilla.redhat.com/show_bug.cgi?id=677260
> 

Please use CVE-2011-0711.

Thanks.

-- 
    JB

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