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Vulnerability of Libtasn1: NULL pointer dereference via _asn1_check_identifier

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via _asn1_check_identifier() of Libtasn1, in order to trigger a denial of service.
Vulnerable products: Debian, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this weakness: 1/4.
Creation date: 25/07/2017.
Références of this bulletin: CVE-2017-10790, DLA-1038-1, DLA-2255-1, DSA-4106-1, openSUSE-SU-2018:2854-1, openSUSE-SU-2018:2958-1, SUSE-SU-2018:2825-1, SUSE-SU-2018:2842-1, SUSE-SU-2018:2930-1, USN-3547-1, VIGILANCE-VUL-23346.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via _asn1_check_identifier() of Libtasn1, in order to trigger a denial of service.
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This security announce impacts software or systems such as Debian, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

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

An attacker with a expert ability can exploit this computer vulnerability announce.

Solutions for this threat 

Debian 7: new libtasn1-3 packages.
New packages are available:
  Debian 7: libtasn1-3 2.13-2+deb7u5

Debian 8: new libtasn1-6 packages.
New packages are available:
  Debian 8: libtasn1-6 4.2-3+deb8u4

Debian 9: new libtasn1-6 packages.
New packages are available:
  Debian 9: libtasn1-6 4.10-1.1+deb9u1

openSUSE Leap 15.0: new gnutls packages.
New packages are available:
  openSUSE Leap 15.0: gnutls 3.6.2-lp150.4.3.1

openSUSE Leap 42.3: new gnutls packages.
New packages are available:
  openSUSE Leap 42.3: gnutls 3.3.27-2.3.1

SUSE LE 12: new gnutls packages.
New packages are available:
  SUSE LE 12 RTM: gnutls 3.2.15-18.6.1
  SUSE LE 12 SP1: gnutls 3.2.15-18.6.1
  SUSE LE 12 SP2: gnutls 3.2.15-18.6.1

SUSE LE 12 SP3: new gnutls packages.
New packages are available:
  SUSE LE 12 SP3: gnutls 3.3.27-3.3.1

SUSE LE 15: new gnutls packages.
New packages are available:
  SUSE LE 15 RTM: gnutls 3.6.2-6.3.1

Ubuntu: new libtasn1-6 packages.
New packages are available:
  Ubuntu 17.10: libtasn1-6 4.12-2.1ubuntu0.1
  Ubuntu 16.04 LTS: libtasn1-6 4.7-3ubuntu0.16.04.3
  Ubuntu 14.04 LTS: libtasn1-6 3.4-3ubuntu0.6
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