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Gentoo Linux Security Advisory GLSA 200409-05 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Gallery: Arbitrary command execution |
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Date: September 02, 2004 |
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Bugs: #60742 |
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ID: 200409-05 |
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Synopsis |
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======== |
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|
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The Gallery image upload code contains a temporary file handling |
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vulnerability which could lead to execution of arbitrary commands. |
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|
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Background |
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========== |
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|
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Gallery is a PHP script for maintaining online photo albums. |
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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-apps/gallery < 1.4.4_p2 >= 1.4.4_p2 |
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|
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Description |
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=========== |
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|
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The upload handling code in Gallery places uploaded files in a |
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temporary directory. After 30 seconds, these files are deleted if they |
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are not valid images. However, since the file exists for 30 seconds, a |
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carefully crafted script could be initiated by the remote attacker |
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during this 30 second timeout. Note that the temporary directory has to |
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be located inside the webroot and an attacker needs to have upload |
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rights either as an authenticated user or via "EVERYBODY". |
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|
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Impact |
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====== |
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|
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An attacker could run arbitrary code as the user running PHP. |
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|
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Workaround |
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========== |
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|
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There are several workarounds to this vulnerability: |
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|
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* Make sure that your temporary directory is not contained in the |
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webroot; by default it is located outside the webroot. |
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|
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* Disable upload rights to all albums for "EVERYBODY"; upload is |
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disabled by default. |
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* Disable debug and dev mode; these settings are disabled by default. |
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* Disable allow_url_fopen in php.ini. |
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Resolution |
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========== |
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All Gallery users should upgrade to the latest version: |
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# emerge sync |
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# emerge -pv ">=www-apps/gallery-1.4.4_p2" |
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# emerge ">=www-apps/gallery-1.4.4_p2" |
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|
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References |
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========== |
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|
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[ 1 ] Full Disclosure Announcement |
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http://archives.neohapsis.com/archives/fulldisclosure/2004-08/0757.html |
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[ 2 ] Gallery Announcement |
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http://gallery.menalto.com/modules.php?op=modload&name=News&file=article&sid=134&mode=thread&order=0&thold=0 |
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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-200409-05.xml |
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|
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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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|
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License |
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======= |
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|
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Copyright 2004 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/1.0 |
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