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Gentoo Linux Security Advisory GLSA 200704-18 |
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http://security.gentoo.org/ |
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|
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Severity: High |
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Title: Courier-IMAP: Remote execution of arbitrary code |
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Date: April 22, 2007 |
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Bugs: #168196 |
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ID: 200704-18 |
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|
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Synopsis |
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======== |
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|
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A vulnerability has been discovered in Courier-IMAP allowing for remote |
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code execution with root privileges. |
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|
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Background |
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========== |
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|
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Courier-IMAP is an IMAP server which is part of the Courier mail |
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system. It provides access only to maildirs. |
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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 net-mail/courier-imap < 4.0.6-r2 >= 4.0.6-r2 |
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|
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Description |
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=========== |
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|
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CJ Kucera has discovered that some Courier-IMAP scripts don't properly |
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handle the XMAILDIR variable, allowing for shell command injection. |
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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 specially crafted login credentials to a |
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Courier-IMAP server instance, possibly leading to remote code execution |
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with root privileges. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. |
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|
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Resolution |
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========== |
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|
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All Courier-IMAP users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-mail/courier-imap-4.0.6-r2" |
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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-200704-18.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 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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|
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http://creativecommons.org/licenses/by-sa/2.5 |