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Gentoo Linux Security Advisory GLSA 201110-19 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: X.Org X Server: Multiple vulnerabilities |
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Date: October 22, 2011 |
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Bugs: #387069 |
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ID: 201110-19 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilities in the X.Org X server might allow local |
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attackers to disclose information. |
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Background |
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========== |
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|
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The X Window System is a graphical windowing system based on a |
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client/server model. |
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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 x11-base/xorg-server < 1.10.4-r1 *>= 1.9.5-r1 |
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>= 1.10.4-r1 |
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|
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Description |
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=========== |
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|
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vladz reported the following vulnerabilities in the X.Org X server: |
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|
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* The X.Org X server follows symbolic links when trying to access the |
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lock file for a X display, showing a predictable behavior depending |
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on the file type of the link target (CVE-2011-4028). |
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* The X.Org X server lock file mechanism allows for a race condition to |
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cause the X server to modify the file permissions of an arbitrary |
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file to 0444 (CVE-2011-4029). |
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|
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Impact |
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====== |
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|
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A local attacker could exploit these vulnerabilities to disclose |
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information by making arbitrary files on a system world-readable or |
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gain information whether a specified file exists on the system and |
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whether it is a file, directory, or a named pipe. |
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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 X.Org X Server 1.9 users should upgrade to the latest 1.9 version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.9.5-r1" |
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All X.Org X Server 1.10 users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.10.4-r1" |
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|
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References |
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========== |
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[ 1 ] CVE-2011-4028 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4028 |
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[ 2 ] CVE-2011-4029 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4029 |
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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-201110-19.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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https://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2011 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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