FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

powerdns-recursor -- multiple vulnerabilities

Affected packages
4.3.0 <= powerdns-recursor < 4.3.1
4.2.0 <= powerdns-recursor < 4.2.2
4.1.0 <= powerdns-recursor < 4.1.16


VuXML ID f9c5a410-9b4e-11ea-ac3f-6805ca2fa271
Discovery 2020-05-19
Entry 2020-05-26
Modified 2020-05-29

PowerDNS Team reports:

CVE-2020-10995: 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-2020-12244: 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-2020-10030: An issue has been found in PowerDNS Authoritative Server allowing an attacker with enough privileges to change the system's hostname to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not null-terminate the returned string if the hostname is larger than the supplied buffer. Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname is always null-terminated. Under some conditions this issue can lead to the writing of one null-byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.


CVE Name CVE-2020-10030
CVE Name CVE-2020-10995
CVE Name CVE-2020-12244