GNOME gThumb add_themes_from_dir Method Double-Free Vulnerability [CVE-2018-18718]

CVE Number –  CVE-2018-18718

A vulnerability in the add_themes_from_dir method of GNOME gThumb could allow a local attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to a double-free condition that exists in the add_themes_from_dir method, as defined in the dlg-contact-sheet.c source code file of the affected software. An attacker could exploit this vulnerability by making two successive calls to the g_free function on a targeted system. A successful exploit could trigger a double-free condition that the attacker could use to cause a DoS condition.

GNOME has confirmed the vulnerability; however, software updates are not available.

  • 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.
  • Administrators are advised to contact the vendor regarding future updates and releases.

    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
  • GNOME has released an issue report at the following link: Issue #18
Fixed Software
  • At the time this alert was first published, GNOME had not released software updates.

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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