Stack-based buffer overflow in the administration interface in Monit 1.4 through 4.2 allows remote attackers to execute arbitrary code via a long username.

The administration interface in Monit 1.4 through 4.2 allows remote attackers to cause an off-by-one overflow via a POST that contains 1024 bytes.

Administration interface in Monit 1.4 through 4.2 allows remote attackers to cause a denial of service (segmentation fault) by sending a Basic Authentication request without a password, which causes Monit to decrement a null pointer and perform an out-of-bounds read.