diff options
| author | Kees Cook <keescook@chromium.org> | 2013-05-10 14:48:21 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-06-19 02:16:59 +0100 |
| commit | bfb624e7fd41437a2c256adaf4041fe4414f8f26 (patch) | |
| tree | 2410efa506bff88257d74675a5fde45669863c2f | |
| parent | 9fa72f6b1b0faa477a8317902e6f6eb2b32c832d (diff) | |
b43: stop format string leaking into error msgs
commit e0e29b683d6784ef59bbc914eac85a04b650e63c upstream.
The module parameter "fwpostfix" is userspace controllable, unfiltered,
and is used to define the firmware filename. b43_do_request_fw() populates
ctx->errors[] on error, containing the firmware filename. b43err()
parses its arguments as a format string. For systems with b43 hardware,
this could lead to a uid-0 to ring-0 escalation.
CVE-2013-2852
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/net/wireless/b43/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c index c0f20417b769..b0c280180c91 100644 --- a/drivers/net/wireless/b43/main.c +++ b/drivers/net/wireless/b43/main.c @@ -2421,7 +2421,7 @@ static int b43_request_firmware(struct b43_wldev *dev) for (i = 0; i < B43_NR_FWTYPES; i++) { errmsg = ctx->errors[i]; if (strlen(errmsg)) - b43err(dev->wl, errmsg); + b43err(dev->wl, "%s", errmsg); } b43_print_fw_helptext(dev->wl, 1); err = -ENOENT; |