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bgpd: Check if we have real stream data for tunnel encapsulation sub-tlvs

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When the packet is malformed it can use whatever values it wants. Let's check
what the real data we have in a stream instead of relying on malformed values.

Reported-by: Iggy Frankovic <iggyfran@amazon.com>
Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
(cherry picked from commit 9929486d6b)
This commit is contained in:
Donatas Abraitis 2024-06-13 09:00:21 +03:00 committed by Mergify
parent c105f9acd9
commit c01d60b037
1 changed files with 1 additions and 1 deletions
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2
bgpd/bgp_attr.c
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@ -2721,7 +2721,7 @@ static int bgp_attr_encap(struct bgp_attr_parser_args *args)
}
}
while (length >= 4) {
while (STREAM_READABLE(BGP_INPUT(peer)) >= 4) {
uint16_t subtype = 0;
uint16_t sublength = 0;
struct bgp_attr_encap_subtlv *tlv;