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CVE-2019-11396

Status Candidate

Overview

An issue was discovered in Avira Free Security Suite 10. The permissive access rights on the SoftwareUpdater folder (files / folders and configuration) are incompatible with the privileged file manipulation performed by the product. Files can be created that can be used by an unprivileged user to obtain SYSTEM privileges. Arbitrary file creation can be achieved by abusing the SwuConfig.json file creation: an unprivileged user can replace these files by pseudo-symbolic links to arbitrary files. When an update occurs, a privileged service creates a file and sets its access rights, offering write access to the Everyone group in any directory.

Related Files

Avira Free Security Suite 2019 Software Updater 2.0.6.13175 Improper Access Control
Posted Aug 4, 2019
Authored by Silton Santos

Avira Free Security Suite 2019 Software Updater version 2.0.6.13175 suffers from an improper access control that allows for arbitrary file write that can allow an unprivileged user to obtain SYSTEM privileges.

tags | advisory, arbitrary
advisories | CVE-2019-11396
MD5 | a4d390f701aa2edd6b20fd861c82f57b
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