ArchLinux: 201811-12: powerdns: denial of service
Summary
- CVE-2018-10851 (denial of service)
An issue has been found in PowerDNS Authoritative Server before 4.1.5
and PowerDNS Recursor before 4.1.5. The issue is due to the fact that
some memory is allocated before the parsing and is not always properly
released if the record is malformed.
In the authoritative server case, it allows an authorized user to cause
a memory leak by inserting a specially crafted record in a zone under
their control, then sending a DNS query for that record. In the case of
the recursor, it allows a malicious authoritative server to cause a
memory leak by sending specially crafted records.
- CVE-2018-14626 (denial of service)
An issue has been found in PowerDNS Authoritative Server before 4.1.5
and PowerDNS Recursor before 4.1.5, allowing a remote user to craft a
DNS query that will cause an answer without DNSSEC records to be
inserted into the packet cache and be returned to clients asking for
DNSSEC records, thus hiding the presence of DNSSEC signatures for a
specific qname and qtype. For a DNSSEC-signed domain, this means that
DNSSEC validating clients will consider the answer to be bogus until it
expires from the packet cache, leading to a denial of service.
Resolution
Upgrade to 4.1.5-1.
# pacman -Syu "powerdns>=4.1.5-1"
The problems have been fixed upstream in version 4.1.5.
References
https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2018-05.html https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2018-03.html https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-04.html https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-06.html https://security.archlinux.org/CVE-2018-10851 https://security.archlinux.org/CVE-2018-14626
Workaround
None.