- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202008-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Shadow: Privilege escalation Date: August 25, 2020 Bugs: #702252 ID: 202008-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= Multiple Shadow utilities were installed with setuid permissions, allowing possible root privilege escalation. Background ========= Shadow is a set of tools to deal with user accounts. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-apps/shadow < 4.8-r3 >= 4.8-r3 Description ========== When Shadow was installed with the PAM use flag, setuid binaries provided by Shadow were not properly restricted. Impact ===== A local attacker could escalate privileges to root. Workaround ========= There is no known workaround at this time. Resolution ========= All Shadow users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.8-r3" References ========= [ 1 ] CVE-2019-19882 https://nvd.nist.gov/vuln/detail/CVE-2019-19882 [ 2 ] Upstream mitigation https://github.com/shadow-maint/shadow/pull/199 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202008-09 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 2020 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