ubuntu-cve-2016-7068
Vulnerability from osv_ubuntu
Published
2018-09-11 13:29
Modified
2025-09-08 16:43
Summary
Details
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.
Severity
5.3 (Medium)
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "pdns-recursor",
"binary_version": "3.5.3-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "pdns-recursor",
"purl": "pkg:deb/ubuntu/pdns-recursor@3.5.3-1ubuntu0.1?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.3-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.3-3",
"3.5.3-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "pdns-backend-geoip",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-backend-ldap",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-backend-lua",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-backend-mydns",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-backend-mysql",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-backend-pgsql",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-backend-pipe",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-backend-remote",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-backend-sqlite3",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-backend-tinydns",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-server",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
},
{
"binary_name": "pdns-tools",
"binary_version": "4.0.0~alpha2-3ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "pdns",
"purl": "pkg:deb/ubuntu/pdns@4.0.0~alpha2-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.4.5-1build2",
"3.4.6-2",
"3.4.6-3",
"3.4.7-1",
"3.4.7-2",
"4.0.0~alpha1-1",
"4.0.0~alpha2-2",
"4.0.0~alpha2-3",
"4.0.0~alpha2-3build1",
"4.0.0~alpha2-3ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "pdns-recursor",
"binary_version": "4.0.0~alpha2-2ubuntu0.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "pdns-recursor",
"purl": "pkg:deb/ubuntu/pdns-recursor@4.0.0~alpha2-2ubuntu0.1+esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.7.3-1",
"4.0.0~alpha1-1",
"4.0.0~alpha1-2",
"4.0.0~alpha2-2",
"4.0.0~alpha2-2ubuntu0.1",
"4.0.0~alpha2-2ubuntu0.1+esm1"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2016-7068",
"modified": "2025-09-08T16:43:50Z",
"published": "2018-09-11T13:29:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2016-7068"
},
{
"type": "REPORT",
"url": "https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2016-7068"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2016-7068"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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