The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "4.88-NA"
},
{
"introduced": "0"
},
{
"last_affected": "4.89-NA"
}
]
}