opensuse-su-2020:0698-1
Vulnerability from csaf_opensuse
Published
2020-05-23 07:22
Modified
2020-05-23 07:22
Summary
Security update for pdns-recursor

Notes

Title of the patch
Security update for pdns-recursor
Description of the patch
This update for pdns-recursor fixes the following issues: - update to 4.1.16 * fixes an issue where records in the answer section of a NXDOMAIN response lacking an SOA were not properly validated (CVE-2020-12244, boo#1171553) * fixes an issue where invalid hostname on the server can result in disclosure of invalid memory (CVE-2020-10030, boo#1171553) * fixes an issue in the DNS protocol has been found that allows malicious parties to use recursive DNS services to attack third party authoritative name servers (CVE-2020-10995, boo#1171553) For details see https://doc.powerdns.com/recursor/changelog/4.1.html#change-4.1.16
Patchnames
openSUSE-2020-698
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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          "text": "An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system\u0027s 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 have \u0027\\0\u0027 termination of 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 always has \u0027\\0\u0027 termination.) Under some conditions, this issue can lead to the writing of one \u0027\\0\u0027 byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.",
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          "text": "PowerDNS Recursor from 4.1.0 up to and including 4.3.0 does not sufficiently defend against amplification attacks. 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. This is triggered by random subdomains in the NSDNAME in NS records. PowerDNS Recursor 4.1.16, 4.2.2 and 4.3.1 contain a mitigation to limit the impact of this DNS protocol issue.",
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          "text": "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, allowing an attacker to bypass DNSSEC validation.",
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}


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