Linux Security
Linux Security
Linux Security

Debian: DSA-3000-1: krb5 security update

Date 09 Aug 2014
156
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
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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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