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Vulnerability of Apache httpd: privilege escalation via mod_session CGI Applications

Synthesis of the vulnerability 

An attacker can bypass restrictions via mod_session CGI Applications of Apache httpd, in order to escalate his privileges.
Impacted software: Apache httpd, Apache httpd Modules ~ not comprehensive, Debian, Fedora, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this computer vulnerability: 3/4.
Creation date: 26/03/2018.
Références of this announce: CVE-2018-1283, DSA-4164-1, FEDORA-2018-375e3244b6, openSUSE-SU-2018:1198-1, RHSA-2018:3558-01, RHSA-2020:3958-01, SUSE-SU-2018:0879-1, SUSE-SU-2018:0901-1, USN-3627-1, USN-3627-2, VIGILANCE-VUL-25642.

Description of the vulnerability 

An attacker can bypass restrictions via mod_session CGI Applications of Apache httpd, in order to escalate his privileges.
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This computer vulnerability announce impacts software or systems such as Apache httpd, Apache httpd Modules ~ not comprehensive, Debian, Fedora, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity bulletin is important.

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

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

Solutions for this threat 

Apache httpd: version 2.4.30.
The version 2.4.30 is fixed:
  http://httpd.apache.org/download.cgi

Debian 8/9: new apache2 packages.
New packages are available:
  Debian 8: apache2 2.4.10-10+deb8u12
  Debian 9: apache2 2.4.25-3+deb9u4

Fedora 27: new httpd packages.
New packages are available:
  Fedora 27: httpd 2.4.33-2.fc27

openSUSE Leap 42.3: new apache2 packages.
New packages are available:
  openSUSE Leap 42.3: apache2 2.4.23-22.1

RHEL 7.8: new httpd packages.
New packages are available:
  RHEL 7.0-7.8: httpd 2.4.6-95.el7

RHEL: new httpd24 packages.
New packages are available:
  RHEL 6: httpd24-curl 7.61.1-1.el6, httpd24-httpd 2.4.34-7.el6, httpd24-nghttp2 1.7.1-7.el6
  RHEL 7: httpd24-curl 7.61.1-1.el7, httpd24-httpd 2.4.34-7.el7, httpd24-nghttp2 1.7.1-7.el7

SUSE LE 12 RTM: new apache2 packages.
New packages are available:
  SUSE LE 12 RTM: apache2 2.4.10-14.31.1

SUSE LE 12 SP1: new apache2 packages.
New packages are available:
  SUSE LE 12 SP1: apache2 2.4.16-20.16.1

Ubuntu: new apache2-bin packages.
New packages are available:
  Ubuntu 18.04 LTS: apache2-bin 2.4.29-1ubuntu4.1
  Ubuntu 17.10: apache2-bin 2.4.27-2ubuntu4.1
  Ubuntu 16.04 LTS: apache2-bin 2.4.18-2ubuntu3.8
  Ubuntu 14.04 LTS: apache2-bin 2.4.7-1ubuntu4.20
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