[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <4F21798C.5040205@schaufler-ca.com>
Date: Thu, 26 Jan 2012 08:04:28 -0800
From: Casey Schaufler <casey@...aufler-ca.com>
To: Miklos Szeredi <miklos@...redi.hu>
CC: john.johansen@...onical.com, apparmor@...ts.ubuntu.com,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
draht@...e.com, LSM <linux-security-module@...r.kernel.org>
Subject: Re: security_path hooks for xattr
On 1/26/2012 4:45 AM, Miklos Szeredi wrote:
> Forwarding from an internal bug report:
>
> "AppArmor does not mediate the xattr system calls for confined processes.
>
> As a consequence, a confined process can cross the confinement privilege
> boundary by reading or writing to extended attributes that the confined
> task should not have access to. The restrictions for security and user
> attributes read and write still apply according to DAC; however, this
> does not comply with the claim of AppArmor to mediate fipe
> operations. The use of extended attributes is very flexible, so that the
> effect of a missing mediation can lead to false assumptions in
> subsequent policy decisions (eCryptfs)."
>
> AFAIU this boils down to missing security hooks in *xattr().
>
> Would it be possible to add these hooks?
Please post proposed patches to linux-security-module@...r.kernel.org
>
> Thanks,
> Miklos
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists