http.cc in Squid 4.x before 4.0.7 relies on the HTTP status code after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "4.0.1"
},
{
"introduced": "0"
},
{
"last_affected": "4.0.2"
},
{
"introduced": "0"
},
{
"last_affected": "4.0.3"
},
{
"introduced": "0"
},
{
"last_affected": "4.0.4"
},
{
"introduced": "0"
},
{
"last_affected": "4.0.5"
},
{
"introduced": "0"
},
{
"last_affected": "4.0.6"
}
]
}