[ GLSA 200709-01 ] MIT Kerberos 5: Multiple vulnerabilities

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  Severity: High
     Title: MIT Kerberos 5: Multiple vulnerabilities
      Date: September 11, 2007
      Bugs: #191301
        ID: 200709-01

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Synopsis

Two vulnerabilites have been found in MIT Kerberos 5, which could allow a remote unauthenticated user to execute arbitrary code with root privileges.

Background

MIT Kerberos 5 is a suite of applications that implement the Kerberos network protocol. kadmind is the MIT Kerberos 5 administration daemon.

Affected packages

     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  app-crypt/mit-krb5     < 1.5.3-r1                     >= 1.5.3-r1

Description

A stack buffer overflow (CVE-2007-3999) has been reported in svcauth_gss_validate() of the RPC library of kadmind. Another vulnerability (CVE-2007-4000) has been found in kadm5_modify_policy_internal(), which does not check the return values of krb5_db_get_policy() correctly.

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Impact

The RPC related vulnerability can be exploited by a remote unauthenticated attacker to execute arbitrary code with root privileges on the host running kadmind. The second vulnerability requires the remote attacker to be authenticated and to have "modify policy" privileges. It could then also allow for the remote execution of arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All MIT Kerberos 5 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.5.3-r1"

References

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  [ 1 ] CVE-2007-3999
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3999   [ 2 ] CVE-2007-4000
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4000

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200709-01.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License

Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

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