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bgpd: Make sure hdr length is at a minimum of what is expected

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Ensure that if the capability length specified is enough data.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
This commit is contained in:
Donald Sharp 2022-07-21 08:11:58 -04:00
parent 49efc80d34
commit ff6db1027f
1 changed files with 8 additions and 0 deletions
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8
bgpd/bgp_packet.c
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@ -2620,6 +2620,14 @@ static int bgp_capability_msg_parse(struct peer *peer, uint8_t *pnt,
"%s CAPABILITY has action: %d, code: %u, length %u",
peer->host, action, hdr->code, hdr->length);
if (hdr->length < sizeof(struct capability_mp_data)) {
zlog_info(
"%pBP Capability structure is not properly filled out, expected at least %zu bytes but header length specified is %d",
peer, sizeof(struct capability_mp_data),
hdr->length);
return BGP_Stop;
}
/* Capability length check. */
if ((pnt + hdr->length + 3) > end) {
zlog_info("%s Capability length error", peer->host);