Advisories ยป MGASA-2020-0223

Updated pdns-recursor packages fix security vulnerabilities

Publication date: 24 May 2020
Type: security
Affected Mageia releases : 7
CVE: CVE-2020-10995 , CVE-2020-12244


Updated pdns-recursor packages fix security vulnerabilities:

An issue in the DNS protocol has been found that allow malicious parties
to use recursive DNS services to attack third party authoritative name
servers. The attack uses a crafted reply by an authoritative name server
to amplify the resulting traffic between the recursive and other
authoritative name servers. Both types of service can suffer degraded
performance as an effect (CVE-2020-10995).

An issue has been found in PowerDNS Recursor 4.1.0 through 4.3.0 where
records in the answer section of a NXDOMAIN response lacking an SOA were
not properly validated in SyncRes::processAnswer. This would allow an
attacker in position of man-in-the-middle to send a NXDOMAIN answer for
a name that does exist, bypassing DNSSEC validation (CVE-2020-12244).