linux-kernel - Re: [PATCH 1/1] integrity: prevent loading untrusted certificates to IMA trusted keyring

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Date:	Wed, 23 Sep 2015 23:08:46 +0300
From:	Dmitry Kasatkin <dmitry.kasatkin@...il.com>
To:	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	linux-security-module <linux-security-module@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:	Dmitry Kasatkin <dmitry.kasatkin@...wei.com>,
	stable@...r.kernel.org
Subject: Re: [PATCH 1/1] integrity: prevent loading untrusted certificates to
 IMA trusted keyring

Hi,

Apply this patch, please...

Dmitry


On Thu, Sep 10, 2015 at 10:06 PM, Dmitry Kasatkin
<dmitry.kasatkin@...il.com> wrote:
> If IMA_LOAD_X509 is enabled either directly or indirectly via
> IMA_APPRAISE_SIGNED_INIT, it enables certificate loading to the IMA trusted
> keyring from the kernel. Due to the overlook, KEY_ALLOC_TRUSTED was used in the
> key_create_or_update() to create keys within the kernel, which caused
> overriding certificate verification result and allowed to load self-signed or
> wrongly signed certificates.
>
> This patch just removes this option.
>
> Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@...wei.com>
> Cc:  <stable@...r.kernel.org> # 3.19+
> ---
>  security/integrity/digsig.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
> index 36fb6b5..5be9ffb 100644
> --- a/security/integrity/digsig.c
> +++ b/security/integrity/digsig.c
> @@ -105,7 +105,7 @@ int __init integrity_load_x509(const unsigned int id, const char *path)
>                                    rc,
>                                    ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
>                                     KEY_USR_VIEW | KEY_USR_READ),
> -                                  KEY_ALLOC_NOT_IN_QUOTA | KEY_ALLOC_TRUSTED);
> +                                  KEY_ALLOC_NOT_IN_QUOTA);
>         if (IS_ERR(key)) {
>                 rc = PTR_ERR(key);
>                 pr_err("Problem loading X.509 certificate (%d): %s\n",
> --
> 2.1.4
>



-- 
Thanks,
Dmitry
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