CVE-2016-5427
published 2016-09-21CVE-2016-5427: PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of…
PriorityP353high7.5CVSS 3.0
AVNACLPRNUINSUCNINAH
EPSS
62.98%
99.1th percentile
PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | pdns | < pdns 4.0.0~alpha1-1 (bookworm) | pdns 4.0.0~alpha1-1 (bookworm) |
| open-xchange | pdns | >= 0 < 4.0.0~alpha1-1 | 4.0.0~alpha1-1 |
| open-xchange | pdns | >= 0 < 4.0.0~alpha1-1 | 4.0.0~alpha1-1 |
| open-xchange | pdns | >= 0 < 4.0.0~alpha1-1 | 4.0.0~alpha1-1 |
| open-xchange | pdns | >= 0 < 4.0.0~alpha1-1 | 4.0.0~alpha1-1 |
| powerdns | authoritative | <= 3.4.9 | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Detect DNS queries where a label within the qname contains a literal dot (.) character — this is the crafted input vector for CVE-2016-5427 against PowerDNS Authoritative Server <= 3.4.9. ↗
- →Monitor backend (e.g. SQL) CPU/load for abnormal spikes triggered by inbound DNS queries, which may indicate exploitation of this DoS vector. ↗
- →The PowerDNS Recursor is NOT affected; focus detection and patching efforts solely on the Authoritative Server component running versions up to and including 3.4.9. ↗
- ·Only PowerDNS Authoritative Server versions up to and including 3.4.9 are vulnerable; version 3.4.10 and later (including 4.0.0+) contain the fix. ↗
- ·The attack is unauthenticated and remote — no credentials or prior access are required to send the crafted DNS query. ↗
CVSS provenance
nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_debian7.5HIGH
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GHSA
GHSA-8c2c-pfjh-2jc2: PowerDNS (aka pdns) Authoritative Server before 3
ghsa_unreviewed·2022-05-17
CVE-2016-5427 [HIGH] GHSA-8c2c-pfjh-2jc2: PowerDNS (aka pdns) Authoritative Server before 3
PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.
OSV
CVE-2016-5427: PowerDNS (aka pdns) Authoritative Server before 3
osv·2016-09-21·CVSS 7.5
CVE-2016-5427 [HIGH] CVE-2016-5427: PowerDNS (aka pdns) Authoritative Server before 3
PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.
Debian
CVE-2016-5427: pdns - PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle ...
vendor_debian·2016·CVSS 7.5
CVE-2016-5427 [HIGH] CVE-2016-5427: pdns - PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle ...
PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.
Scope: local
bookworm: resolved (fixed in 4.0.0~alpha1-1)
bullseye: resolved (fixed in 4.0.0~alpha1-1)
forky: resolved (fixed in 4.0.0~alpha1-1)
sid: resolved (fixed in 4.0.0~alpha1-1)
trixie: resolved (fixed in 4.0.0~alpha1-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-5426 CVE-2016-5427 pdns: Crafted queries can cause unexpected backend load [fedora-23]
bugzilla·2016-09-12·CVSS 7.5
CVE-2016-5426 [HIGH] CVE-2016-5426 CVE-2016-5427 pdns: Crafted queries can cause unexpected backend load [fedora-23]
CVE-2016-5426 CVE-2016-5427 pdns: Crafted queries can cause unexpected backend load [fedora-23]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
[bug automatically created by: add-tra
Bugzilla
CVE-2016-5426 CVE-2016-5427 pdns: Crafted queries can cause unexpected backend load [epel-all]
bugzilla·2016-09-12·CVSS 7.5
CVE-2016-5426 [HIGH] CVE-2016-5426 CVE-2016-5427 pdns: Crafted queries can cause unexpected backend load [epel-all]
CVE-2016-5426 CVE-2016-5427 pdns: Crafted queries can cause unexpected backend load [epel-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora EPEL.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple
Bugzilla
CVE-2016-5426 CVE-2016-5427 pdns: Crafted queries can cause unexpected backend load
bugzilla·2016-09-12·CVSS 7.5
CVE-2016-5426 [HIGH] CVE-2016-5426 CVE-2016-5427 pdns: Crafted queries can cause unexpected backend load
CVE-2016-5426 CVE-2016-5427 pdns: Crafted queries can cause unexpected backend load
Two issues have been found in PowerDNS Authoritative Server allowing a remote, unauthenticated attacker to cause an abnormal load on the PowerDNS backend by sending crafted DNS queries, which might result in a partial denial of service if the backend becomes overloaded. SQL backends for example are particularly vulnerable to this kind of unexpected load if they have not been dimensioned for it.
The first issue is based on the fact that PowerDNS Authoritative Server accepts queries with a qname's length larger than 255 bytes. This issue has been assigned CVE-2016-5426.
The second issue is based on the fact that PowerDNS Authoritative Server does not properly handle dot inside labels. This issue has been a
http://www.debian.org/security/2016/dsa-3664http://www.openwall.com/lists/oss-security/2016/09/09/3http://www.securityfocus.com/bid/92917http://www.securitytracker.com/id/1036761https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/https://github.com/PowerDNS/pdns/commit/881b5b03a590198d03008e4200dd00cc537712f3http://www.debian.org/security/2016/dsa-3664http://www.openwall.com/lists/oss-security/2016/09/09/3http://www.securityfocus.com/bid/92917http://www.securitytracker.com/id/1036761https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/https://github.com/PowerDNS/pdns/commit/881b5b03a590198d03008e4200dd00cc537712f3
2016-09-21
Published