The DECnet parser in tcpdump before 4.9.2 has a buffer over-read in print-decnet.c:decnet_print().
[
{
"signature_version": "v1",
"source": "https://github.com/the-tcpdump-group/tcpdump/commit/c6e0531b5def26ecf912e8de6ade86cbdaed3751",
"signature_type": "Line",
"target": {
"file": "print-decnet.c"
},
"id": "CVE-2017-12899-1c3fa5d3",
"digest": {
"line_hashes": [
"97309171798116027704152776105792758352",
"202851830595322960463851297252094900468",
"314265668100881536153814412545404771965",
"308816446158332546450191570671655444140",
"23533344398641834198172974992934638080",
"95115430590302785342181281353886271818",
"180366772670796087988678728071636150239",
"215687783348938839369991650784927111587"
],
"threshold": 0.9
},
"deprecated": false
},
{
"signature_version": "v1",
"source": "https://github.com/the-tcpdump-group/tcpdump/commit/c6e0531b5def26ecf912e8de6ade86cbdaed3751",
"signature_type": "Function",
"target": {
"function": "decnet_print",
"file": "print-decnet.c"
},
"id": "CVE-2017-12899-9f39db55",
"digest": {
"length": 2702.0,
"function_hash": "13135879451585810704536699378390137068"
},
"deprecated": false
}
]