- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201808-02 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Low Title: LinuX Containers user space utilities: Arbitrary file read Date: August 22, 2018 Bugs: #662780 ID: 201808-02 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A vulnerability has been found in LXC which may allow for arbitrary file access (read-only). Background ========== LinuX Containers user space utilities. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-emulation/lxc < 3.0.1-r1 >= 3.0.1-r1 Description =========== lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. Impact ====== A local unprivileged user could use this flaw to access arbitrary files, including special device files. Workaround ========== There is no known workaround at this time. Resolution ========== All LXC users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-emulation/lxc-3.0.1-r1" References ========== [ 1 ] CVE-2018-6556 https://nvd.nist.gov/vuln/detail/CVE-2018-6556 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201808-02 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2018 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5