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Vulnerability of Exim: code execution via TLS SNI Backslash Null

Synthesis of the vulnerability 

An attacker can use a vulnerability via TLS SNI Backslash Null of Exim, in order to run code.
Vulnerable products: Debian, Exim, openSUSE Leap, SLES, Ubuntu.
Severity of this weakness: 4/4.
Creation date: 06/09/2019.
Références of this bulletin: CVE-2019-15846, DLA-1911-1, DSA-4517-1, openSUSE-SU-2019:2093-1, openSUSE-SU-2021:0753-1, USN-4124-1, USN-4124-2, VIGILANCE-VUL-30264.

Description of the vulnerability 

An attacker can use a vulnerability via TLS SNI Backslash Null of Exim, in order to run code.
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This security bulletin impacts software or systems such as Debian, Exim, openSUSE Leap, SLES, Ubuntu.

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

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

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

Solutions for this threat 

Exim: version 4.92.2.
The version 4.92.2 is fixed:
  http://exim.org/
  http://exim.org/mirrors.html

Debian 8: new exim4 packages.
New packages are available:
  Debian 8: exim4 4.84.2-2+deb8u6

Debian 9/10: new exim4 packages.
New packages are available:
  Debian 9: exim4 4.89-2+deb9u6
  Debian 10: exim4 4.92-8+deb10u2

openSUSE Leap 15: new exim packages.
New packages are available:
  openSUSE Leap 15.0: exim 4.88-lp150.3.9.1
  openSUSE Leap 15.1: exim 4.88-lp151.4.9.1

SUSE LE 15 SP1: new exim packages.
New packages are available:
  SUSE LE 15 SP1: exim 4.94.2-bp151.2.4.1

Ubuntu: new exim4-daemon packages.
New packages are available:
  Ubuntu 19.04: exim4-daemon 4.92-4ubuntu1.3
  Ubuntu 18.04 LTS: exim4-daemon 4.90.1-1ubuntu1.4
  Ubuntu 16.04 LTS: exim4-daemon 4.86.2-2ubuntu2.5
  Ubuntu 14.04 ESM: exim4-daemon-heavy 4.82-3ubuntu2.4+esm1, exim4-daemon-light 4.82-3ubuntu2.4+esm1
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