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Vulnerability of MIT krb5: buffer overflow of kadmind

Synthesis of the vulnerability 

An attacker can generate a buffer overflow in kadmind of MIT krb5, in order to trigger a denial of service, and possibly to execute code.
Vulnerable systems: Debian, BIG-IP Hardware, TMOS, Fedora, MIT krb5, openSUSE, Oracle Communications, Solaris, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 3/4.
Creation date: 08/08/2014.
Revision date: 12/08/2014.
Références of this weakness: cpuoct2017, CVE-2014-4345, DSA-3000-1, FEDORA-2014-9305, FEDORA-2014-9315, MDVSA-2014:165, MITKRB5-SA-2014-001, openSUSE-SU-2014:1043-1, RHSA-2014:1255-01, RHSA-2014:1389-02, RHSA-2015:0439-01, SOL15566, SUSE-SU-2014:1028-1, USN-2310-1, VIGILANCE-VUL-15140.

Description of the vulnerability 

The MIT krb5 product may be configured to use an LDAP directory as an account database.

However, if the processing of messages for kadmind with LDAP, the source file ldap_principal2.c uses a wrong structure to determine the size of a data block. So, an overflow may occur.

An attacker can therefore generate a buffer overflow in kadmind of MIT krb5, in order to trigger a denial of service, and possibly to execute code.
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This vulnerability bulletin impacts software or systems such as Debian, BIG-IP Hardware, TMOS, Fedora, MIT krb5, openSUSE, Oracle Communications, Solaris, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this security note is important.

The trust level is of type confirmed by the editor, with an origin of intranet client.

An attacker with a expert ability can exploit this cybersecurity note.

Solutions for this threat 

MIT krb5: version 1.12.2.
The version 1.12.2 is fixed:
  http://web.mit.edu/kerberos/

MIT krb5: version 1.11.6.
The version 1.11.6 is fixed:
  http://web.mit.edu/kerberos/

MIT krb5: patch for kadmind.
A patch is available in information sources.

Debian: new krb5 packages.
New packages are available:
  Debian 7: krb5 1.10.1+dfsg-5+deb7u2

F5 BIG-IP: fixed versions for Kerberos.
Fixed versions are indicated in information sources.

Fedora: new krb5 packages.
New packages are available:
  Fedora 19: krb5 1.11.3-25.fc19
  Fedora 20: krb5 1.11.5-11.fc20

Mandriva: new krb5 packages.
New packages are available:
  Mandriva BS1: krb5 1.9.2-3.5.mbs1

openSUSE: new krb5 packages.
New packages are available:
  openSUSE 13.1: krb5 1.11.3-3.12.1
  openSUSE 12.3: krb5 1.10.2-10.30.1

Oracle Communications: CPU of October 2017.
A Critical Patch Update is available.

RHEL 5: new krb5 packages.
New packages are available:
  RHEL 5: krb5 1.6.1-80.el5_11

RHEL 6: new krb5 packages.
New packages are available:
  RHEL 6: krb5 1.10.3-33.el6

RHEL 7: new krb5 packages.
New packages are available:
  RHEL 7: krb5 1.12.2-14.el7

Solaris 10: patch for Kerberos.
A patch is available:
  SPARC: 147793-14
  X86: 147794-14

Solaris: version 11.2.4.6.0.
The version 11.2.4.6.0 is fixed:
  https://support.oracle.com/rs?type=doc&id=1945067.1

SUSE LE 11: new krb5 packages.
New packages are available:
  SUSE LE 11: krb5 1.6.3-133.49.62.1

Ubuntu: new krb5 packages.
New packages are available, as indicated in information sources.
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