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| author | Shuah Khan <shuahkh@osg.samsung.com> | 2017-12-07 14:16:49 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-16 20:14:43 +0100 |
| commit | 67ad0235bacc1af72dad6eac6c5ac1a072b905f7 (patch) | |
| tree | c11aa4827ddfd60b749d4d82b959ff7d455a6b49 /tools/usb | |
| parent | eebf31529012289ec20fea84e4e6fd188176be13 (diff) | |
| download | linux-stable-67ad0235bacc1af72dad6eac6c5ac1a072b905f7.tar.gz linux-stable-67ad0235bacc1af72dad6eac6c5ac1a072b905f7.tar.bz2 linux-stable-67ad0235bacc1af72dad6eac6c5ac1a072b905f7.zip | |
usbip: prevent vhci_hcd driver from leaking a socket pointer address
commit 2f2d0088eb93db5c649d2a5e34a3800a8a935fc5 upstream.
When a client has a USB device attached over IP, the vhci_hcd driver is
locally leaking a socket pointer address via the
/sys/devices/platform/vhci_hcd/status file (world-readable) and in debug
output when "usbip --debug port" is run.
Fix it to not leak. The socket pointer address is not used at the moment
and it was made visible as a convenient way to find IP address from socket
pointer address by looking up /proc/net/{tcp,tcp6}.
As this opens a security hole, the fix replaces socket pointer address with
sockfd.
Reported-by: Secunia Research <vuln@secunia.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/usb')
| -rw-r--r-- | tools/usb/usbip/libsrc/vhci_driver.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/usb/usbip/libsrc/vhci_driver.c b/tools/usb/usbip/libsrc/vhci_driver.c index ad9204773533..1274f326242c 100644 --- a/tools/usb/usbip/libsrc/vhci_driver.c +++ b/tools/usb/usbip/libsrc/vhci_driver.c @@ -55,12 +55,12 @@ static int parse_status(const char *value) while (*c != '\0') { int port, status, speed, devid; - unsigned long socket; + int sockfd; char lbusid[SYSFS_BUS_ID_SIZE]; - ret = sscanf(c, "%d %d %d %x %lx %31s\n", + ret = sscanf(c, "%d %d %d %x %u %31s\n", &port, &status, &speed, - &devid, &socket, lbusid); + &devid, &sockfd, lbusid); if (ret < 5) { dbg("sscanf failed: %d", ret); @@ -69,7 +69,7 @@ static int parse_status(const char *value) dbg("port %d status %d speed %d devid %x", port, status, speed, devid); - dbg("socket %lx lbusid %s", socket, lbusid); + dbg("sockfd %u lbusid %s", sockfd, lbusid); /* if a device is connected, look at it */ |