CVE-2015-1868
HighThe label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and 3.7.x before 3.7.2 and Authoritative (Auth) Server 3.2.x, 3.3.x before 3.3.2, and 3.4.x before 3.4.4 allows remote attackers to cause a denial of service (CPU consumption or crash) via a…
Published May 18, 2015 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2015-1868, UBUNTU-CVE-2015-1868
Key Facts
Patch immediately- CVE-2015-1868 is a high-severity vulnerability (CVSS 7.8 v2) affecting Authoritative (Powerdns), Recursor (Powerdns), Fedora (Fedoraproject) and 11 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 82% probability of exploitation in the next 30 days.
- Fixed versions are available, including pdns 3.3-2ubuntu0.1, pdns 3.4.4-1, pdns 4.0.1-1.2.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
7.8
AV:N/AC:L/Au:N/C:N/I:N/A:C
EPSS (30-day exploit likelihood)
82%
Higher than 99.6% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2015-1868 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
The label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and 3.7.x before 3.7.2 and Authoritative (Auth) Server 3.2.x, 3.3.x before 3.3.2, and 3.4.x before 3.4.4 allows remote attackers to cause a denial of service (CPU consumption or crash) via a request with a name that refers to itself.
Affected Products
54 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| AuthoritativePowerdns | 3.2, 3.3, 3.3.1, 3.3.2, 3.4.0, 3.4.1, 3.4.3 | n/a |
| RecursorPowerdns | 3.5, 3.5.1, 3.5.2, 3.5.3, 3.6.0, 3.6.1, 3.6.2, 3.6.3 | n/a |
| FedoraFedoraproject | 20, 21, 22 | n/a |
| pdnsdebian | See advisory | 3.4.4-1 |
| pdns-recursordebian | See advisory | 3.7.2-1 |
Patched Releases
pdns
3.3-2ubuntu0.1, 3.4.4-1, 4.0.1-1.2
pdns-backend-geoip
4.0.1-1.2
pdns-backend-godbc
4.0.1-1.2
pdns-backend-ldap
4.0.1-1.2
pdns-backend-lua
4.0.1-1.2
pdns-backend-mydns
4.0.1-1.2
pdns-backend-mysql
4.0.1-1.2
pdns-backend-postgresql
4.0.1-1.2
pdns-backend-remote
4.0.1-1.2
pdns-backend-sqlite3
4.0.1-1.2
pdns-recursor
3.5.3-1ubuntu0.1, 3.7.2-1, 4.0.3-1.2
Timeline
Publicly disclosed
May 18, 2015
Last updated
Aug 4, 2026
Weakness Type
- CWE-399
References
- advisoryFEDORA-2015-7079
- advisoryFEDORA-2015-7033
- advisoryFEDORA-2015-7057
- advisoryFEDORA-2015-7047
- advisoryFEDORA-2015-7031
FAQ
Common Questions.
The label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and 3.7.x before 3.7.2 and Authoritative (Auth) Server 3.2.x, 3.3.x before 3.3.2, and 3.4.x before 3.4.4 allows remote attackers to cause a denial of service (CPU consumption or crash) via a request with a name that refers to itself.
Affected: Authoritative (Powerdns) versions 3.2, 3.3, 3.3.1, 3.3.2, 3.4.0, 3.4.1, 3.4.3; Recursor (Powerdns) versions 3.5, 3.5.1, 3.5.2, 3.5.3, 3.6.0, 3.6.1, 3.6.2, 3.6.3; Fedora (Fedoraproject) versions 20, 21, 22, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including pdns 3.3-2ubuntu0.1, pdns 3.4.4-1, pdns 4.0.1-1.2.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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