Debian: DSA-3764-1: pdns security update

    Date13 Jan 2017
    CategoryDebian
    77
    Posted ByLinuxSecurity Advisories
    Multiple vulnerabilities have been discovered in pdns, an authoritative DNS server. The Common Vulnerabilities and Exposures project identifies the following problems:
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-3764-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    January 13, 2017                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : pdns
    CVE ID         : CVE-2016-2120 CVE-2016-7068 CVE-2016-7072 CVE-2016-7073 
                     CVE-2016-7074
    
    Multiple vulnerabilities have been discovered in pdns, an authoritative
    DNS server. The Common Vulnerabilities and Exposures project identifies
    the following problems:
    
    CVE-2016-2120
    
        Mathieu Lafon discovered that pdns does not properly validate
        records in zones. An authorized user can take advantage of this flaw
        to crash server by inserting a specially crafted record in a zone
        under their control and then sending a DNS query for that record.
    
    CVE-2016-7068
    
        Florian Heinz and Martin Kluge reported that pdns parses all records
        present in a query regardless of whether they are needed or even
        legitimate, allowing a remote, unauthenticated attacker to cause an
        abnormal CPU usage load on the pdns server, resulting in a partial
        denial of service if the system becomes overloaded.
    
    CVE-2016-7072
    
        Mongo discovered that the webserver in pdns is susceptible to a
        denial-of-service vulnerability. A remote, unauthenticated attacker
        to cause a denial of service by opening a large number of f TCP
        connections to the web server.
    
    CVE-2016-7073 / CVE-2016-7074
    
        Mongo discovered that pdns does not sufficiently validate TSIG
        signatures, allowing an attacker in position of man-in-the-middle to
        alter the content of an AXFR.
    
    For the stable distribution (jessie), these problems have been fixed in
    version 3.4.1-4+deb8u7.
    
    For the unstable distribution (sid), these problems have been fixed in
    version 4.0.2-1.
    
    We recommend that you upgrade your pdns packages.
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    
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