X.Org X Server Improper Permissions Check Privilege Escalation Vulnerability [CVE-2018-14665]

CVE Number –  CVE-2018-14665

A vulnerability in X.Org X Server could allow a local attacker to gain elevated privileges on a targeted system.

The vulnerability is due to an incorrect permissions check for the -modulepath and -logfile options of the affected system. A local attacker with physical access could exploit this vulnerability by executing commands with the -modulepath or -logfile options on a targeted system that is running with elevated privileges. A successful exploit could allow the attacker to gain escalated privileges or run arbitrary code on a targeted system.

X.Org has confirmed the vulnerability and released a software patch.

Analysis
  • To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement may reduce the likelihood of a successful exploit.
Safeguards
  • Administrators are advised to apply the appropriate updates.

    Administrators are advised to allow only trusted users to access local systems.

    Administrators are advised to allow only privileged users to access administration or management systems.

    Administrators are advised to monitor critical systems.

Vendor Announcements
Fixed Software

Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

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