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Gentoo Linux Security Advisory GLSA 200602-11 |
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http://security.gentoo.org/ |
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Severity: Low |
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Title: OpenSSH, Dropbear: Insecure use of system() call |
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Date: February 20, 2006 |
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Bugs: #119232 |
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ID: 200602-11 |
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Synopsis |
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======== |
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|
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A flaw in OpenSSH and Dropbear allows local users to elevate their |
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privileges via scp. |
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|
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Background |
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========== |
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|
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OpenSSH is a free application suite consisting of server and clients |
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that replace tools like telnet, rlogin, rcp and ftp with more secure |
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versions offering additional functionality. Dropbear is an SSH server |
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and client designed with a small memory footprint that includes OpenSSH |
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scp code. |
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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/openssh < 4.2_p1-r1 >= 4.2_p1-r1 |
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2 net-misc/dropbear < 0.47-r1 >= 0.47-r1 |
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------------------------------------------------------------------- |
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2 affected packages on all of their supported architectures. |
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------------------------------------------------------------------- |
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|
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Description |
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=========== |
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|
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To copy from a local filesystem to another local filesystem, scp |
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constructs a command line using 'cp' which is then executed via |
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system(). Josh Bressers discovered that special characters are not |
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escaped by scp, but are simply passed to the shell. |
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|
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Impact |
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====== |
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|
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By tricking other users or applications to use scp on maliciously |
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crafted filenames, a local attacker user can execute arbitrary commands |
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with the rights of the user running scp. |
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|
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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 OpenSSH users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/openssh-4.2_p1-r1" |
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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-0.47-r1" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2006-0225 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0225 |
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|
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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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http://security.gentoo.org/glsa/glsa-200602-11.xml |
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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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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2006 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/2.0 |
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