Buffer Overflow in bvlc.c of skarg BACnet Protocol Stack bacserv 0.9.1 and 0.8.5: Lack of Packet-Size Validation

CVE-2018-10238 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

bvlc.c in skarg BACnet Protocol Stack bacserv 0.9.1 and 0.8.5 is affected by a Buffer Overflow because of a lack of packet-size validation. The affected component is bacserv BACnet/IP BVLC forwarded NPDU. The function bvlc_bdt_forward_npdu() calls bvlc_encode_forwarded_npdu() which copies the content from the request into a local in the bvlc_bdt_forward_npdu() stack frame and clobbers the canary. The attack vector is: A BACnet/IP device with BBMD enabled based on this library connected to IP network. The fixed version is: 0.8.6.

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