mwifiex: Fix possible buffer overflows at parsing bss descriptor

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commit 13ec7f10b8 upstream.

mwifiex_update_bss_desc_with_ie() calls memcpy() unconditionally in
a couple places without checking the destination size.  Since the
source is given from user-space, this may trigger a heap buffer
overflow.

Fix it by putting the length check before performing memcpy().

This fix addresses CVE-2019-3846.

Reported-by: huangwen <huangwen@venustech.com.cn>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Takashi Iwai 2019-05-29 14:52:19 +02:00 • committed by Ben Hutchings

parent 1ea04ca97a

commit a24ac7326f

1 changed files with 4 additions and 0 deletions

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drivers/net/wireless/mwifiex/scan.c

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