Overview
- Description
- An issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 3.7.4 and 4.0.4, allowing a remote, unauthenticated attacker to cause an abnormal CPU usage load on the PowerDNS server by sending crafted DNS queries, which might result in a partial denial of service if the system becomes overloaded. This issue is based on the fact that the PowerDNS server parses all records present in a query regardless of whether they are needed or even legitimate. A specially crafted query containing a large number of records can be used to take advantage of that behaviour.
- Source
- secalert@redhat.com
- NVD status
- Modified
Risk scores
CVSS 3.0
- Type
- Primary
- Base score
- 7.5
- Impact score
- 3.6
- Exploitability score
- 3.9
- Vector string
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity
- HIGH
CVSS 2.0
- Type
- Primary
- Base score
- 7.8
- Impact score
- 6.9
- Exploitability score
- 10
- Vector string
- AV:N/AC:L/Au:N/C:N/I:N/A:C
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "45749DBA-3089-4FD6-8999-9A6F0C3B4904",
"versionEndExcluding": "3.4.11"
},
{
"criteria": "cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1DDAEFF5-B01E-4765-98F8-F00F80806118",
"versionEndExcluding": "4.0.2",
"versionStartIncluding": "4.0.0"
},
{
"criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0A95C8FD-FB1C-4AFF-84E8-B8BFAF678F31",
"versionEndExcluding": "3.7.4"
},
{
"criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F07E82C1-0CEF-405D-8BE7-6918C64BABB2",
"versionEndExcluding": "4.0.4",
"versionStartIncluding": "4.0.0"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"
}
],
"operator": "OR"
}
]
}
]