CVE-2021-28153

Name of the Vulnerable Software and Affected Versions GNOME GLib versions prior to 2.66.8

Description An issue was discovered in GNOME GLib when the g file replace() function is used with G FILE CREATE REPLACE DESTINATION to replace a path that is a dangling symlink. It incorrectly creates the target of the symlink as an empty file, which could have security relevance if the symlink is attacker-controlled. If the path is a symlink to a file that already exists, the contents of that file remain unchanged. The vulnerability may allow a remote attacker to impact data integrity without requiring root privileges.

Recommendations For GNOME GLib versions prior to 2.66.8, update to version 2.66.8 or later to resolve the issue. As a temporary workaround, consider restricting the use of the g file replace() function with G FILE CREATE REPLACE DESTINATION when handling dangling symlinks to minimize the risk of exploitation.