A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.
{
"unresolved_ranges": [
{
"extracted_events": [
{
"introduced": "29"
},
{
"last_affected": "29"
},
{
"introduced": "30"
},
{
"last_affected": "30"
}
],
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*"
],
"source": "CPE_STRING",
"vendor_product": "fedoraproject:fedora"
}
]
}{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "3.2.0"
},
{
"introduced": "4.0.0"
},
{
"fixed": "4.1.0"
}
],
"cpe": "cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*",
"source": "CPE_RANGE"
}