CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
19.5%
If a server hosts a zone containing a “KEY” Resource Record, or a resolver DNSSEC-validates a “KEY” Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0) signed requests.
This issue affects BIND 9 versions 9.0.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.49-S1, and 9.18.11-S1 through 9.18.27-S1.
[
{
"vendor": "ISC",
"product": "BIND 9",
"versions": [
{
"version": "9.0.0",
"lessThanOrEqual": "9.11.37",
"status": "affected",
"versionType": "custom"
},
{
"version": "9.16.0",
"lessThanOrEqual": "9.16.50",
"status": "affected",
"versionType": "custom"
},
{
"version": "9.18.0",
"lessThanOrEqual": "9.18.27",
"status": "affected",
"versionType": "custom"
},
{
"version": "9.19.0",
"lessThanOrEqual": "9.19.24",
"status": "affected",
"versionType": "custom"
},
{
"version": "9.9.3-S1",
"lessThanOrEqual": "9.11.37-S1",
"status": "affected",
"versionType": "custom"
},
{
"version": "9.16.8-S1",
"lessThanOrEqual": "9.16.49-S1",
"status": "affected",
"versionType": "custom"
},
{
"version": "9.18.11-S1",
"lessThanOrEqual": "9.18.27-S1",
"status": "affected",
"versionType": "custom"
}
],
"defaultStatus": "unaffected"
}
]