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Vulnerability of krb5: NULL pointer dereference via ldap_principal2.c

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced in ldap_principal2.c of krb5, in order to trigger a denial of service.
Impacted software: Debian, VNX Operating Environment, VNX Series, Fedora, Juniper SBR, MIT krb5, openSUSE Leap, RHEL, SLES.
Severity of this computer vulnerability: 1/4.
Number of vulnerabilities in this bulletin: 2.
Creation date: 21/02/2018.
Références of this announce: CVE-2018-5729, CVE-2018-5730, DLA-1643-1, DSA-2019-131, FEDORA-2018-391a1f3e61, FEDORA-2018-f97cb1c9b0, JSA11074, openSUSE-SU-2018:0854-1, openSUSE-SU-2019:0139-1, RHSA-2018:3071-01, SUSE-SU-2019:0175-1, VIGILANCE-VUL-25336.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced in ldap_principal2.c of krb5, in order to trigger a denial of service.
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This security bulletin impacts software or systems such as Debian, VNX Operating Environment, VNX Series, Fedora, Juniper SBR, MIT krb5, openSUSE Leap, RHEL, SLES.

Our Vigil@nce team determined that the severity of this cybersecurity announce is low.

The trust level is of type confirmed by the editor, with an origin of privileged account.

This bulletin is about 2 vulnerabilities.

An attacker with a expert ability can exploit this vulnerability alert.

Solutions for this threat 

MIT krb5: version 1.16.1.
The version 1.16.1 is fixed:
  https://kerberos.org/dist/

MIT krb5: version 1.15.3.
The version 1.15.3 is fixed:
  https://kerberos.org/dist/

Debian 8: new krb5 packages.
New packages are available:
  Debian 8: krb5 1.12.1+dfsg-19+deb8u5

Dell EMC VNXe3200: version 3.1.10.9946299.
The version 3.1.10.9946299 is fixed:
  https://www.dell.com/

Fedora: new krb5 packages.
New packages are available:
  Fedora 26: krb5 1.15.2-7.fc26
  Fedora 27: krb5 1.15.2-7.fc27

Juniper Networks SBR Carrier: fixed versions for Third-party Software.
Fixed versions are indicated in information sources.

openSUSE Leap 15.0: new krb5 packages.
New packages are available:
  openSUSE Leap 15.0: krb5 1.15.2-lp150.5.6.1

openSUSE Leap 42.3: new krb5 packages.
New packages are available:
  openSUSE Leap 42.3: krb5 1.12.5-16.1

RHEL 7: new krb5 packages.
New packages are available:
  RHEL 7: krb5 1.15.1-34.el7

SUSE LE 15: new krb5 packages.
New packages are available:
  SUSE LE 15 RTM: krb5 1.15.2-6.6.2
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