diff options
| author | Kees Cook <keescook@chromium.org> | 2013-05-10 14:48:21 -0700 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2013-06-12 10:20:59 -0400 |
| commit | e0e29b683d6784ef59bbc914eac85a04b650e63c (patch) | |
| tree | 80d2f170443f2c7bc711c7dfaf31f9b19304718b | |
| parent | 5efac94999ff218e0101f67a059e44abb4b0b523 (diff) | |
| download | linux-e0e29b683d6784ef59bbc914eac85a04b650e63c.tar.bz2 | |
b43: stop format string leaking into error msgs
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>
Cc: stable@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -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 6dd07e2ec595..a95b77ab360e 100644 --- a/drivers/net/wireless/b43/main.c +++ b/drivers/net/wireless/b43/main.c @@ -2458,7 +2458,7 @@ static void b43_request_firmware(struct work_struct *work) 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); goto out; |