CVE-2017-15120 Null dereference in pdns-recursor

What is CVE-2017-15120?

CVE-2017-15120 is a high-severity vulnerability in Debian Debian Linux, published on 27 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-476

Which versions are affected by CVE-2017-15120?

It affects 2 products.

Products include Debian Debian Linux, Powerdns Recursor.

How do I fix CVE-2017-15120?

Upgrade to a fixed version.

Is CVE-2017-15120 being exploited?

There is no known exploitation of CVE-2017-15120 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-15120, DSA-4063-1, GHSA-rxpc-3cmh-w743, UBUNTU-CVE-2017-15120.