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Gentoo Linux Security Advisory GLSA 200709-16 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: Lighttpd: Buffer overflow |
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Date: September 27, 2007 |
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Bugs: #191912 |
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ID: 200709-16 |
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Synopsis |
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======== |
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|
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Lighttpd is vulnerable to the remote execution of arbitrary code. |
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Background |
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========== |
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Lighttpd is a lightweight HTTP web server. |
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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-servers/lighttpd < 1.4.18 >= 1.4.18 |
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|
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Description |
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=========== |
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|
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Mattias Bengtsson and Philip Olausson have discovered a buffer overflow |
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vulnerability in the function fcgi_env_add() in the file mod_fastcgi.c |
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when processing overly long HTTP headers. |
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|
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Impact |
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====== |
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|
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A remote attacker could send a specially crafted request to the |
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vulnerable Lighttpd server, resulting in the remote execution of |
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arbitrary code with privileges of the user running the web server. Note |
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that mod_fastcgi is disabled in Gentoo's default configuration. |
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|
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Workaround |
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========== |
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|
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Edit the file /etc/lighttpd/lighttpd.conf and comment the following |
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line: "include mod_fastcgi.conf" |
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Resolution |
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========== |
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All Lighttpd users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=www-servers/lighttpd-1.4.18" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2007-4727 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4727 |
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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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|
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http://security.gentoo.org/glsa/glsa-200709-16.xml |
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Concerns? |
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========= |
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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 2007 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/2.5 |
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