The prescan() function in the address parser (parseaddr.c) in Sendmail before 8.12.9 does not properly handle certain conversions from char and int types, which can cause a length check to be disabled when Sendmail misinterprets an input value as a special "NOCHAR" control value, allowing attackers to cause a denial of service and possibly execute arbitrary code via a buffer overflow attack using messages, a different vulnerability than CVE-2002-1337.
AV:N/AC:L/Au:N/C:C/I:C/A:C
This vulnerability has a 38.79% probability of being exploited in the next 30 days, ranking higher than 99% of all scored CVEs.