- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201702-23 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Dropbear: Multiple vulnerabilities Date: February 20, 2017 Bugs: #605560 ID: 201702-23 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in Dropbear, the worst of which allows remote attackers to execute arbitrary code. Background ========== Dropbear is an SSH server and client designed with a small memory footprint. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/dropbear < 2016.74 >= 2016.74 Description =========== Multiple vulnerabilities have been discovered in Dropbear. Please review the CVE identifiers referenced below for details. Impact ====== A remote attacker could possibly execute arbitrary code with root privileges if usernames containing special characters can be created on a system. Also, a dbclient user who can control username or host arguments could potentially run arbitrary code with the privileges of the process. In addition, a remote attacker could entice a user to process a specially crafted SSH key using dropbearconvert, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition. Workaround ========== There is no known workaround at this time. Resolution ========== All Dropbear users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/dropbear-2016.74" References ========== [ 1 ] CVE-2016-7406 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7406 [ 2 ] CVE-2016-7407 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7407 [ 3 ] CVE-2016-7408 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7408 [ 4 ] CVE-2016-7409 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7409 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201702-23 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 2017 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. http://creativecommons.org/licenses/by-sa/2.5 --VrD7fqcu6xqU0tPFpCStfRBJLuJI6ckQ5--