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VuXML IDDescription
f9c5a410-9b4e-11ea-ac3f-6805ca2fa271powerdns-recursor -- multiple vulnerabilities

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.


Discovery 2020-05-19
Entry 2020-05-26
Modified 2020-05-29
powerdns-recursor
ge 4.3.0 lt 4.3.1

ge 4.2.0 lt 4.2.2

ge 4.1.0 lt 4.1.16

https://doc.powerdns.com/recursor/security-advisories/index.html
CVE-2020-10995
CVE-2020-12244
CVE-2020-10030
40d92cc5-1e2b-11e9-bef6-6805ca2fa271powerdns-recursor -- multiple vulnerabilities

PowerDNS Team reports:

CVE-2019-3806: An issue has been found in PowerDNS Recursor where Lua hooks are not properly applied to queries received over TCP in some specific combination of settings, possibly bypassing security policies enforced using Lua. When the recursor is configured to run with more than one thread (threads=X) and to do the distribution of incoming queries to the worker threads itself (pdns-distributes-queries=yes), the Lua script is not properly loaded in the thread handling incoming TCP queries, causing the Lua hooks to not be properly applied.

CVE-2019-3807: An issue has been found in PowerDNS Recursor where records in the answer section of responses received from authoritative servers with the AA flag not set were not properly validated, allowing an attacker to bypass DNSSEC validation.


Discovery 2019-01-21
Entry 2019-01-22
powerdns-recursor
< 4.1.9

https://doc.powerdns.com/recursor/changelog/4.1.html
CVE-2019-3806
CVE-2019-3807
f6d6308a-f2ec-11e8-b005-6805ca2fa271powerdns-recursor -- Crafted query can cause a denial of service

powerdns Team reports:

CVE-2018-16855: An issue has been found in PowerDNS Recursor where a remote attacker sending a DNS query can trigger an out-of-bounds memory read while computing the hash of the query for a packet cache lookup, possibly leading to a crash. When the PowerDNS Recursor is run inside a supervisor like supervisord or systemd, a crash will lead to an automatic restart, limiting the impact to a somewhat degraded service.


Discovery 2018-11-26
Entry 2018-12-09
powerdns-recursor
< 4.1.8

https://doc.powerdns.com/recursor/changelog/4.1.html
CVE-2018-16855
a6860b11-0dee-11eb-94ff-6805ca2fa271powerdns-recursor -- cache pollution

PowerDNS Team reports:

CVE-2020-25829: An issue has been found in PowerDNS Recursor where a remote attacker can cause the cached records for a given name to be updated to the ‘Bogus’ DNSSEC validation state, instead of their actual DNSSEC ‘Secure’ state, via a DNS ANY query. This results in a denial of service for installations that always validate (dnssec=validate) and for clients requesting validation when on-demand validation is enabled (dnssec=process).


Discovery 2020-10-13
Entry 2020-10-14
powerdns-recursor
ge 4.3.0 lt 4.3.5

ge 4.2.0 lt 4.2.5

ge 4.1.0 lt 4.1.18

https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.html
CVE-2020-25829
641cd669-bc37-11ea-babf-6805ca2fa271powerdns-recursor -- access restriction bypass

PowerDNS Team reports:

CVE-2020-14196: An issue has been found in PowerDNS Recursor where the ACL applied to the internal web server via webserver-allow-from is not properly enforced, allowing a remote attacker to send HTTP queries to the internal web server, bypassing the restriction. In the default configuration the API webserver is not enabled. Only installations using a non-default value for webserver and webserver-address are affected.


Discovery 2020-07-01
Entry 2020-07-02
powerdns-recursor
ge 4.3.0 lt 4.3.2

ge 4.2.0 lt 4.2.3

ge 4.1.0 lt 4.1.17

https://doc.powerdns.com/recursor/security-advisories/index.html
CVE-2020-14196