CVE-2017-15120: Null Pointer Dereference
First published: Fri Jul 27 2018(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/pdns-recursor | 4.1.11-1+deb10u1 4.4.2-3 4.8.4-1 4.9.1-3 | |
| PowerDNS | <4.0.8 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 |
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Reference Links
- https://downloads.powerdns.com/patches/2017-08
- https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2017-08.html
- https://security-tracker.debian.org/tracker/CVE-2017-15120
- http://seclists.org/oss-sec/2017/q4/382
- http://www.securityfocus.com/bid/106335
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-15120
- https://www.debian.org/security/2017/dsa-4063
Frequently Asked Questions
What is CVE-2017-15120?
CVE-2017-15120 is an issue found in the parsing of authoritative answers in PowerDNS Recursor before version 4.0.8, which could lead to a NULL pointer dereference and denial of service.
How does CVE-2017-15120 affect PowerDNS Recursor?
CVE-2017-15120 affects PowerDNS Recursor versions before 4.0.8.
What is the severity of CVE-2017-15120?
The severity of CVE-2017-15120 is high, with a severity value of 7.5.
How can an attacker exploit CVE-2017-15120?
An unauthenticated remote attacker can exploit CVE-2017-15120 by sending a specially crafted answer containing a CNAME of a different class than IN, which could cause a denial of service.
How can I mitigate CVE-2017-15120?
To mitigate CVE-2017-15120, update PowerDNS Recursor to version 4.0.8 or later.
- collector/security-tracker-debian
- agent/type
- agent/softwarecombine
- agent/remedy
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/author
- agent/weakness
- agent/last-modified-date
- agent/severity
- agent/first-publish-date
- agent/description
- agent/event
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/debian
- vendor/powerdns
- canonical/powerdns
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0