diff options
| author | Kees Cook <keescook@chromium.org> | 2013-08-28 22:30:49 +0200 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2014-05-19 07:53:28 +0200 |
| commit | b7f1dbb911bfc70e750c02a573d7387e727224e6 (patch) | |
| tree | 87f7f324130a29af9e4e3bc87ea0b6d83c931818 /drivers | |
| parent | 267450c9146ff0e8c0aeb988d276f66f67af9500 (diff) | |
HID: pantherlord: validate output report details
commit 412f30105ec6735224535791eed5cdc02888ecb4 upstream
A HID device could send a malicious output report that would cause the
pantherlord HID driver to write beyond the output report allocation
during initialization, causing a heap overflow:
[ 310.939483] usb 1-1: New USB device found, idVendor=0e8f, idProduct=0003
...
[ 315.980774] BUG kmalloc-192 (Tainted: G W ): Redzone overwritten
CVE-2013-2892
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hid/hid-pl.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/hid/hid-pl.c b/drivers/hid/hid-pl.c index c6d7dbc935b..8cdf7b8ecfa 100644 --- a/drivers/hid/hid-pl.c +++ b/drivers/hid/hid-pl.c @@ -128,8 +128,14 @@ static int plff_init(struct hid_device *hid) strong = &report->field[0]->value[2]; weak = &report->field[0]->value[3]; debug("detected single-field device"); - } else if (report->maxfield >= 4 && report->field[0]->maxusage == 1 && - report->field[0]->usage[0].hid == (HID_UP_LED | 0x43)) { + } else if (report->field[0]->maxusage == 1 && + report->field[0]->usage[0].hid == + (HID_UP_LED | 0x43) && + report->maxfield >= 4 && + report->field[0]->report_count >= 1 && + report->field[1]->report_count >= 1 && + report->field[2]->report_count >= 1 && + report->field[3]->report_count >= 1) { report->field[0]->value[0] = 0x00; report->field[1]->value[0] = 0x00; strong = &report->field[2]->value[0]; |