net80211: ieee80211_ies_expand() add extra length check
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Authored by bz on Aug 17 2022, 4:52 PM.

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rG31b4fa3dbcf1: net80211: ieee80211_ies_expand() add extra length check
rG9d2ba51806c3: net80211: ieee80211_ies_expand() add extra length check

Summary

Make sure the given IE length fits into the total length left when
parsing through the information elements. In theory I would say
discard everything if this happens but that proves hard with the
current code.

Sponsored by: The FreeBSD Foundation
MFC after: 1 week

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rG FreeBSD src repository

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Tests Not Applicable

Event Timeline

bz created this revision.Aug 17 2022, 4:52 PM

Herald added subscribers: glebius, melifaro, imp. · View Herald TranscriptAug 17 2022, 4:52 PM

bz requested review of this revision.Aug 17 2022, 4:52 PM

Harbormaster completed remote builds in B46998: Diff 109467.Aug 17 2022, 4:52 PM

nice catch!

This revision is now accepted and ready to land.Aug 17 2022, 4:54 PM

Closed by commit rG9d2ba51806c3: net80211: ieee80211_ies_expand() add extra length check (authored by bz). · Explain WhyAug 18 2022, 8:32 PM

This revision was automatically updated to reflect the committed changes.

bz added a commit: rG9d2ba51806c3: net80211: ieee80211_ies_expand() add extra length check.

bz added a commit: rG31b4fa3dbcf1: net80211: ieee80211_ies_expand() add extra length check.Sep 21 2022, 2:03 PM

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sys/

net80211/

ieee80211_node.c

8 lines

Diff 109534

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sys/net80211/ieee80211_node.c

net80211: ieee80211_ies_expand() add extra length checkClosedPublicActions