Debian: DSA-2208-1: bind9 security update

    Date30 Mar 2011
    CategoryDebian
    38
    Posted ByLinuxSecurity Advisories
    It was discovered that BIND, a DNS server, contains a race condition when processing zones updates in an authoritative server, either through dynamic DNS updates or incremental zone transfer (IXFR). Such an update while processing a query could result in deadlock and denial
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    Debian Security Advisory DSA-2208-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                            Florian Weimer
    March 30, 2011                         http://www.debian.org/security/faq
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    Package        : bind9
    Vulnerability  : denial of service
    Problem type   : remote
    Debian-specific: no
    CVE ID         : CVE-2011-0414
    
    It was discovered that BIND, a DNS server, contains a race condition
    when processing zones updates in an authoritative server, either
    through dynamic DNS updates or incremental zone transfer (IXFR).  Such
    an update while processing a query could result in deadlock and denial
    of service.  (CVE-2011-0414)
    
    In addition, this security update addresses a defect related to the
    processing of new DNSSEC DS records by the caching resolver, which may
    lead to name resolution failures in the delegated zone.  If DNSSEC
    validation is enabled, this issue can make domains ending in .COM
    unavailable when the DS record for .COM is added to the DNS root zone
    on March 31st, 2011.  An unpatched server which is affected by this
    issue can be restarted, thus re-enabling resolution of .COM domains.
    This workaround applies to the version in oldstable, too.
    
    Configurations not using DNSSEC validations are not affected by this
    second issue.
    
    For the oldstable distribution (lenny), the DS record issue will be
    fixed soon.  (CVE-2011-0414 does not affect the lenny version.)
    
    For the stable distribution (squeeze), this problem has been fixed in
    version 1:9.7.3.dfsg-1~squeeze1.
    
    For the testing distribution (wheezy) and the unstable distribution
    (sid), this problem has been fixed in version 1:9.7.3.dfsg-1.
    
    We recommend that you upgrade your bind9 packages.
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: http://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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