Message meets Alert condition
The following intrusion was observed: "Exim.DKIM.DNS.Decoding.Buffer.Overflow".
date=2020-09-25 time=15:54:46 devname=FW-01 devid=FGT81EXXXXXXXXXX logid="0419016384" type="utm" subtype="ips" eventtype="signature" level="alert" vd="root" eventtime=1601020486 severity="medium" srcip=外部IP srccountry="本地" dstip=內部IP srcintf="wan1" srcintfrole="wan" dstintf="port1" dstintfrole="lan" sessionid=63213978 action="dropped" proto=6 service="DNS" policyid=1 attack="Exim.DKIM.DNS.Decoding.Buffer.Overflow" srcport=53 dstport=49594 direction="incoming" attackid=33802 profile="default-1" ref="http://www.fortinet.com/ids/VID33802" incidentserialno=1719639305 msg="name_server: Exim.DKIM.DNS.Decoding.Buffer.Overflow," crscore=10 crlevel="medium"

請問各位大大, 這台是其中一台伺服器, 是不是中了甚麼漏洞? 有在用防毒軟體掃過, 未有發現任何威脅, 防毒軟體是Symantec Endpoint Protection version 14
感謝萬分