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Vulnerability of Apache mod_auth_openidc: open redirect via Slash Backslash

Synthesis of the vulnerability 

An attacker can deceive the user via Slash Backslash of Apache mod_auth_openidc, in order to redirect him to a malicious site.
Impacted software: Apache httpd Modules ~ not comprehensive, Debian, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.
Severity of this computer vulnerability: 1/4.
Creation date: 02/03/2020.
Références of this announce: CVE-2019-20479, DLA-2130-1, openSUSE-SU-2020:0376-1, SUSE-SU-2020:0705-1, SUSE-SU-2020:0706-1, VIGILANCE-VUL-31708.

Description of the vulnerability 

The Apache mod_auth_openidc product offers a web service.

However, the web service accepts to redirect the victim with no warning, to an external site indicated by the attacker.

An attacker can therefore deceive the user via Slash Backslash of Apache mod_auth_openidc, in order to redirect him to a malicious site.
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This weakness alert impacts software or systems such as Apache httpd Modules ~ not comprehensive, Debian, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this computer vulnerability note is low.

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 security bulletin.

Solutions for this threat 

Apache mod_auth_openidc: patch for Slash Backslash.
A patch is indicated in information sources.

Debian 8: new libapache2-mod-auth-openidc packages.
New packages are available:
  Debian 8: libapache2-mod-auth-openidc 1.6.0-1+deb8u3

openSUSE Leap 15.1: new apache2-mod_auth_openidc packages.
New packages are available:
  openSUSE Leap 15.1: apache2-mod_auth_openidc 2.3.8-lp151.2.6.1

SUSE LE 12 SP4/5: new apache2-mod_auth_openidc packages.
New packages are available:
  SUSE LE 12 SP4: apache2-mod_auth_openidc 2.4.0-3.11.1
  SUSE LE 12 SP5: apache2-mod_auth_openidc 2.4.0-3.11.1

SUSE LE 15 SP1: new apache2-mod_auth_openidc packages.
New packages are available:
  SUSE LE 15 SP1: apache2-mod_auth_openidc 2.3.8-3.7.1
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