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Gentoo Linux Security Advisory GLSA 200611-01 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: Screen: UTF-8 character handling vulnerability |
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Date: November 03, 2006 |
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Bugs: #152770 |
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ID: 200611-01 |
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Synopsis |
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======== |
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|
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Screen contains an error in its UTF-8 character handling code that |
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would allow a remote Denial of Service or possibly the remote execution |
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of arbitrary code. |
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|
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Background |
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========== |
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|
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Screen is a full-screen window manager that multiplexes a physical |
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terminal between several processes, typically interactive shells. |
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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-misc/screen < 4.0.3 >= 4.0.3 |
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|
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Description |
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=========== |
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|
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cstone and Richard Felker discovered a flaw in Screen's UTF-8 combining |
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character handling. |
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Impact |
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====== |
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|
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The vulnerability can be exploited by writing a special string of |
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characters to a Screen window. A remote attacker could cause a Denial |
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of Service or possibly execute arbitrary code with the privileges of |
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the user running Screen through a program being run inside a Screen |
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session, such as an IRC client or a mail client. |
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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 Screen users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-misc/screen-4.0.3" |
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|
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References |
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========== |
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[ 1 ] CVE-2006-4573 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4573 |
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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-200611-01.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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|
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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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