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Gentoo Linux Security Advisory GLSA 200511-09 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Lynx: Arbitrary command execution |
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Date: November 13, 2005 |
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Bugs: #112213 |
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ID: 200511-09 |
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Synopsis |
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======== |
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|
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Lynx is vulnerable to an issue which allows the remote execution of |
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arbitrary commands. |
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|
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Background |
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========== |
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|
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Lynx is a fully-featured WWW client for users running |
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cursor-addressable, character-cell display devices such as vt100 |
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terminals and terminal emulators. |
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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 www-client/lynx < 2.8.5-r2 >= 2.8.5-r2 |
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|
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Description |
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=========== |
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|
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iDefense labs discovered a problem within the feature to execute local |
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cgi-bin programs via the "lynxcgi:" URI handler. Due to a configuration |
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error, the default settings allow websites to specify commands to run |
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as the user running Lynx. |
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|
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Impact |
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====== |
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|
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A remote attacker can entice a user to access a malicious HTTP server, |
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causing Lynx to execute arbitrary commands. |
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|
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Workaround |
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========== |
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|
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Disable "lynxcgi" links by specifying the following directive in |
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lynx.cfg: |
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TRUSTED_LYNXCGI:none |
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|
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Resolution |
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========== |
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All Lynx users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=www-client/lynx-2.8.5-r2" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2005-2929 |
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http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2929 |
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[ 2 ] iDefense Security Advisory 11.11.05 |
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http://www.idefense.com/application/poi/display?id=338&type=vulnerabilities |
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|
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Availability |
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============ |
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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-200511-09.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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|
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License |
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======= |
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|
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Copyright 2005 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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http://creativecommons.org/licenses/by-sa/2.0 |
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