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Gentoo Linux Security Advisory GLSA 201511-01 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: MirBSD Korn Shell: Arbitrary code execution |
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Date: November 02, 2015 |
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Bugs: #524414 |
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ID: 201511-01 |
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Synopsis |
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======== |
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|
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An attacker who already had access to the environment could so append |
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values to parameters passed through programs. |
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|
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Background |
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========== |
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|
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MirBSD Korn Shell is an actively developed free implementation of the |
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Korn Shell programming language and a successor to the Public Domain |
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Korn Shell. |
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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 app-shells/mksh < 50c >= 50c |
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Description |
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=========== |
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|
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Improper sanitation of environment import allows for appending of |
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values to passed parameters. |
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|
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Impact |
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====== |
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|
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An attacker who already had access to the environment could so append |
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values to parameters passed through programs (including sudo(8) or |
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setuid) to shell scripts, including indirectly, after those programs |
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intended to sanitise the environment, e.g. invalidating the last $PATH |
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component. |
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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 mksh users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-shells/mksh-50c" |
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|
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References |
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========== |
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[ 1 ] mksh R50c released, security fix |
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https://www.mirbsd.org/permalinks/wlog-10_e20141003-tg.htm#e20141003-tg_wlog-10 |
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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/201511-01 |
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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 2015 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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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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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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