[Hardy CVE-2011-0712] ALSA: caiaq - Fix possible string-buffer overflow, CVE-2011-0712

[Brad Figg]

On 04/22/2011 01:12 PM, Leann Ogasawara wrote:
> The following changes since commit a9db1134ee83026cf7ff4e192785c436d4573bad:
>    Steve Conklin (1):
>          UBUNTU: Ubuntu-2.6.24-29.89
>
> are available in the git repository at:
>
>    git://kernel.ubuntu.com/ogasawara/ubuntu-hardy.git CVE-2011-0712
>
> Takashi Iwai (1):
>        ALSA: caiaq - Fix possible string-buffer overflow, CVE-2011-0712
>
>   sound/usb/caiaq/caiaq-audio.c  |    2 +-
>   sound/usb/caiaq/caiaq-device.c |    4 ++--
>   sound/usb/caiaq/caiaq-midi.c   |    2 +-
>   3 files changed, 4 insertions(+), 4 deletions(-)
>
>  From 211f02c1eadb3c00bc59a20fdf24e9ac8a026326 Mon Sep 17 00:00:00 2001
> From: Takashi Iwai<tiwai at suse.de>
> Date: Mon, 14 Feb 2011 22:45:59 +0100
> Subject: [PATCH] ALSA: caiaq - Fix possible string-buffer overflow, CVE-2011-0712
>
> BugLink: http://bugs.launchpad.net/bugs/768448
>
> CVE-2011-0712
>
> Use strlcpy() to assure not to overflow the string array sizes by
> too long USB device name string.
>
> Reported-by: Rafa<rafa at mwrinfosecurity.com>
> Cc: stable<stable at kernel.org>
> Signed-off-by: Takashi Iwai<tiwai at suse.de>
> (backported from upstream commit eaae55dac6b64c0616046436b294e69fc5311581)
>
> Signed-off-by: Leann Ogasawara<leann.ogasawara at canonical.com>
> ---
>   sound/usb/caiaq/caiaq-audio.c  |    2 +-
>   sound/usb/caiaq/caiaq-device.c |    4 ++--
>   sound/usb/caiaq/caiaq-midi.c   |    2 +-
>   3 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/sound/usb/caiaq/caiaq-audio.c b/sound/usb/caiaq/caiaq-audio.c
> index 0666908..5e1aeac 100644
> --- a/sound/usb/caiaq/caiaq-audio.c
> +++ b/sound/usb/caiaq/caiaq-audio.c
> @@ -636,7 +636,7 @@ int __devinit snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
>   	}
>
>   	dev->pcm->private_data = dev;
> -	strcpy(dev->pcm->name, dev->product_name);
> +	strlcpy(dev->pcm->name, dev->product_name, sizeof(dev->pcm->name));
>
>   	memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
>   	memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
> diff --git a/sound/usb/caiaq/caiaq-device.c b/sound/usb/caiaq/caiaq-device.c
> index 58af814..78b74c3 100644
> --- a/sound/usb/caiaq/caiaq-device.c
> +++ b/sound/usb/caiaq/caiaq-device.c
> @@ -361,8 +361,8 @@ static int init_card(struct snd_usb_caiaqdev *dev)
>   	if (c)
>   		*c = '\0';
>   	
> -	strcpy(card->driver, MODNAME);
> -	strcpy(card->shortname, dev->product_name);
> +	strlcpy(card->driver, MODNAME, sizeof(card->driver));
> +	strlcpy(card->shortname, dev->product_name, sizeof(card->shortname));
>
>   	len = snprintf(card->longname, sizeof(card->longname),
>   		       "%s %s (serial %s, ",
> diff --git a/sound/usb/caiaq/caiaq-midi.c b/sound/usb/caiaq/caiaq-midi.c
> index 793ca20..1c14ba9 100644
> --- a/sound/usb/caiaq/caiaq-midi.c
> +++ b/sound/usb/caiaq/caiaq-midi.c
> @@ -137,7 +137,7 @@ int __devinit snd_usb_caiaq_midi_init(struct snd_usb_caiaqdev *device)
>   	if (ret<  0)
>   		return ret;
>
> -	strcpy(rmidi->name, device->product_name);
> +	strlcpy(rmidi->name, device->product_name, sizeof(rmidi->name));
>
>   	rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
>   	rmidi->private_data = device;

Acked-by: Brad Figg <brad.figg at canonical.com>

-- 
Brad Figg brad.figg at canonical.com http://www.canonical.com