CVE-2017-15120 in the critical feed json
An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference wh…
published 2018-07-27 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-6581
- cvss
- 7.5
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 51.4%
- EPSS 51.4% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.
Patch / fix
- powerdns recursor 4.0.8
- pdns-recursor Debian 14, Debian 13, Debian 12 4.1.0-1
debian advisories DEBIAN-CVE-2017-15120
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2017-15120 updated cvss 7.5
pdns-recursor: Crafted CNAME answer can cause a denial of service
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
51.35% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- PowerDNS pdns-recursor
Classification
- Weakness
-
- CWE-476 NULL Pointer Dereference
References
-
doc.powerdns.com
/recursor/security-advisories/powerdns-advisory-2017-08.html
patch, vendor-advisory
-
seclists.org
/oss-sec/2017/q4/382
mailing-list, patch, third-party-advisory
-
debian.org
/security/2017/dsa-4063
vendor-advisory, third-party-advisory
-
bugzilla.redhat.com
/show_bug.cgi?id=CVE-2017-15120
issue-tracking, third-party-advisory
-
securityfocus.com
/bid/106335
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2017-15120
- NVD CVE-2017-15120
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.