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Gentoo Linux Security Advisory GLSA 201702-23 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: Dropbear: Multiple vulnerabilities |
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Date: February 20, 2017 |
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Bugs: #605560 |
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ID: 201702-23 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilities have been found in Dropbear, the worst of |
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which allows remote attackers to execute arbitrary code. |
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Background |
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========== |
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|
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Dropbear is an SSH server and client designed with a small memory |
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footprint. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-misc/dropbear < 2016.74 >= 2016.74 |
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Description |
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=========== |
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|
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Multiple vulnerabilities have been discovered in Dropbear. Please |
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review the CVE identifiers referenced below for details. |
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|
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Impact |
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====== |
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|
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A remote attacker could possibly execute arbitrary code with root |
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privileges if usernames containing special characters can be created on |
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a system. Also, a dbclient user who can control username or host |
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arguments could potentially run arbitrary code with the privileges of |
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the process. |
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|
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In addition, a remote attacker could entice a user to process a |
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specially crafted SSH key using dropbearconvert, possibly resulting in |
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execution of arbitrary code with the privileges of the process or a |
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Denial of Service condition. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All Dropbear users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/dropbear-2016.74" |
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References |
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========== |
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[ 1 ] CVE-2016-7406 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7406 |
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[ 2 ] CVE-2016-7407 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7407 |
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[ 3 ] CVE-2016-7408 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7408 |
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[ 4 ] CVE-2016-7409 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7409 |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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https://security.gentoo.org/glsa/201702-23 |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users' machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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https://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2017 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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