cfg80211: Validate frequencies nested in NL80211_ATTR_SCAN_FREQUENCIES

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commit d7f13f7450 upstream.

validate_scan_freqs() retrieves frequencies from attributes
nested in the attribute NL80211_ATTR_SCAN_FREQUENCIES with
nla_get_u32(), which reads 4 bytes from each attribute
without validating the size of data received. Attributes
nested in NL80211_ATTR_SCAN_FREQUENCIES don't have an nla policy.

Validate size of each attribute before parsing to avoid potential buffer
overread.

Fixes: 2a51931192 ("cfg80211/nl80211: scanning (and mac80211 update to use it)")
Signed-off-by: Srinivas Dasari <dasaris@qti.qualcomm.com>
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Srinivas Dasari 2017-07-07 01:43:42 +03:00 • committed by Ben Hutchings

parent 2a5d2a5191

commit 3d63d77a52

1 changed files with 4 additions and 0 deletions

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net/wireless/nl80211.c

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