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Vulnerability of PolicyKit: privilege escalation via INT_MAX uid

Synthesis of the vulnerability

An attacker can bypass restrictions via INT_MAX uid of PolicyKit, in order to escalate his privileges.
Severity of this threat: 2/4.
Creation date: 07/12/2018.
Références of this weakness: bulletinjan2019, CVE-2018-19788, DLA-1644-1, DSA-4350-1, FEDORA-2018-2f8696869e, openSUSE-SU-2018:4282-1, openSUSE-SU-2019:0010-1, RHSA-2019:2046-01, RHSA-2019:3232-01, SUSE-SU-2019:0015-1, SUSE-SU-2019:0019-1, SUSE-SU-2019:0019-2, USN-3861-1, USN-3861-2, VIGILANCE-VUL-27980.

Description of the vulnerability

An attacker can bypass restrictions via INT_MAX uid of PolicyKit, in order to escalate his privileges.
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This cybersecurity weakness impacts software or systems such as Debian, Fedora, openSUSE Leap, Solaris, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this security vulnerability is medium.

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

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

Solutions for this threat

Debian 8: new policykit-1 packages.
New packages are available:
  Debian 8: policykit-1 0.105-15~deb8u4

Debian 9: new policykit-1 packages.
New packages are available:
  Debian 9: policykit-1 0.105-18+deb9u1

Fedora 29: new polkit packages.
New packages are available:
  Fedora 29: polkit 0.115-4.1.fc29

openSUSE Leap 15.0: new polkit packages.
New packages are available:
  openSUSE Leap 15.0: polkit 0.114-lp150.2.6.1

openSUSE Leap 42.3: new polkit packages.
New packages are available:
  openSUSE Leap 42.3: polkit 0.113-14.6.1

Oracle Solaris: patch for third party software of January 2019 v2.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

RHEL 7.6: new polkit packages.
New packages are available:
  RHEL 7: polkit 0.112-18.el7_6.2

RHEL 7: new polkit packages.
New packages are available:
  RHEL 7: polkit 0.112-22.el7

SUSE LE 12: new polkit packages.
New packages are available:
  SUSE LE 12 RTM: polkit 0.113-5.15.1
  SUSE LE 12 SP1: polkit 0.113-5.15.1
  SUSE LE 12 SP2: polkit 0.113-5.15.1
  SUSE LE 12 SP3: polkit 0.113-5.15.1
  SUSE LE 12 SP4: polkit 0.113-5.15.1

SUSE LE 15: new polkit packages.
New packages are available:
  SUSE LE 15 RTM: polkit 0.114-3.6.1

Ubuntu: new policykit-1 packages.
New packages are available:
  Ubuntu 18.10: policykit-1 0.105-21ubuntu0.3
  Ubuntu 18.04 LTS: policykit-1 0.105-20ubuntu0.18.04.4
  Ubuntu 16.04 LTS: policykit-1 0.105-14.1ubuntu0.4
  Ubuntu 14.04 LTS: policykit-1 0.105-4ubuntu3.14.04.5
  Ubuntu 12.04 ESM: policykit-1 0.104-1ubuntu1.4
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