Integer signedness error in the dissectorcvs function in dissectors/eccvs.c in Ettercap 0.8.1 allows remote attackers to cause a denial of service (crash) via a crafted password, which triggers a large memory allocation.
Heap-based buffer overflow in the nbnsspoof function in plug-ins/nbnsspoof/nbnsspoof.c in Ettercap 0.8.1 allows remote attackers to cause a denial of service or possibly execute arbitrary code via a large netbios packet.
Integer underflow in Ettercap 0.8.1 allows remote attackers to cause a denial of service (out-of-bounds write) and possibly execute arbitrary code via a small (1) size variable value in the dissectordhcp function in dissectors/ecdhcp.c, (2) length value to the dissectorgg function in dissectors/ecgg.c, or (3) string length to the getdecodelen function in ecutils.c or a request without a (4) username or (5) password to the dissectorTN3270 function in dissectors/ecTN3270.c.
Ettercap 0.8.1 does not validate certain return values, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted (1) name to the parseline function in mdnsspoof/mdnsspoof.c or (2) base64 encoded password to the dissectorimap function in dissectors/ecimap.c.
The dissectorcvs function in dissectors/eccvs.c in Ettercap 0.8.1 allows remote attackers to cause a denial of service (out-of-bounds read) via a packet containing only a CVSLOGIN signature.
The radiusgetattribute function in dissectors/ecradius.c in Ettercap 0.8.1 performs an incorrect cast, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via unspecified vectors, which triggers a stack-based buffer overflow.