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MIT Kerberos 5: Multiple vulnerabilities

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200709-01 / mit-krb5
Release Date September 11, 2007
Latest Revision September 11, 2007: 01
Impact high
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-crypt/mit-krb5 < 1.5.3-r1 >= 1.5.3-r1 All supported architectures

Related bugreports: #191301

Synopsis

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

2.  Impact Information

Background

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

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.

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.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

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

Code Listing 3.1: Resolution

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

4.  References



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Page updated September 11, 2007

Summary: This is a Gentoo Linux Security Advisory

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