Debian: DSA-3000-1: krb5 security update

    Date 09 Aug 2014
    105
    Posted By LinuxSecurity Advisories
    Several vulnerabilities were discovered in krb5, the MIT implementation of Kerberos. The Common Vulnerabilities and Exposures project identifies the following problems:
    
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    Debian Security Advisory DSA-3000-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                      Salvatore Bonaccorso
    August 09, 2014                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : krb5
    CVE ID         : CVE-2014-4341 CVE-2014-4342 CVE-2014-4343 CVE-2014-4344 
                     CVE-2014-4345
    Debian Bug     : 753624 753625 755520 755521 757416
    
    Several vulnerabilities were discovered in krb5, the MIT implementation
    of Kerberos. The Common Vulnerabilities and Exposures project identifies
    the following problems:
    
    CVE-2014-4341
    
        An unauthenticated remote attacker with the ability to inject
        packets into a legitimately established GSSAPI application session
        can cause a program crash due to invalid memory references when
        attempting to read beyond the end of a buffer.
    
    CVE-2014-4342
    
        An unauthenticated remote attacker with the ability to inject
        packets into a legitimately established GSSAPI application session
        can cause a program crash due to invalid memory references when
        reading beyond the end of a buffer or by causing a null pointer
        dereference.
    
    CVE-2014-4343
    
        An unauthenticated remote attacker with the ability to spoof packets
        appearing to be from a GSSAPI acceptor can cause a double-free
        condition in GSSAPI initiators (clients) which are using the SPNEGO
        mechanism, by returning a different underlying mechanism than was
        proposed by the initiator. A remote attacker could exploit this flaw
        to cause an application crash or potentially execute arbitrary code.
    
    CVE-2014-4344
    
        An unauthenticated or partially authenticated remote attacker can
        cause a NULL dereference and application crash during a SPNEGO
        negotiation by sending an empty token as the second or later context
        token from initiator to acceptor.
    
    CVE-2014-4345
    
        When kadmind is configured to use LDAP for the KDC database, an
        authenticated remote attacker can cause it to perform an
        out-of-bounds write (buffer overflow).
    
    For the stable distribution (wheezy), these problems have been fixed in
    version 1.10.1+dfsg-5+deb7u2.
    
    For the unstable distribution (sid), these problems have been fixed in
    version 1.12.1+dfsg-7.
    
    We recommend that you upgrade your krb5 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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