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Gentoo Linux Security Advisory GLSA 200803-25 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Dovecot: Multiple vulnerabilities |
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Date: March 18, 2008 |
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Bugs: #212336, #213030 |
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ID: 200803-25 |
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Synopsis |
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======== |
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|
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Two vulnerabilities in Dovecot allow for information disclosure and |
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argument injection. |
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Background |
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========== |
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|
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Dovecot is a lightweight, fast and easy to configure IMAP and POP3 mail |
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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 net-mail/dovecot < 1.0.13-r1 >= 1.0.13-r1 |
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Description |
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=========== |
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|
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Dovecot uses the group configured via the "mail_extra_groups" setting, |
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which should be used to create lockfiles in the /var/mail directory, |
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when accessing arbitrary files (CVE-2008-1199). Dovecot does not escape |
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TAB characters in passwords when saving them, which might allow for |
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argument injection in blocking passdbs such as MySQL, PAM or shadow |
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(CVE-2008-1218). |
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Impact |
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====== |
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|
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Remote attackers can exploit the first vulnerability to disclose |
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sensitive data, such as the mail of other users, or modify files or |
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directories that are writable by group via a symlink attack. Please |
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note that the "mail_extra_groups" setting is set to the "mail" group by |
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default when the "mbox" USE flag is enabled. |
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|
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The second vulnerability can be abused to inject arguments for internal |
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fields. No exploitation vectors are known for this vulnerability that |
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affect previously stable versions of Dovecot in Gentoo. |
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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 Dovecot users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-mail/dovecot-1.0.13-r1" |
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This version removes the "mail_extra_groups" option and introduces a |
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"mail_privileged_group" setting which is handled safely. |
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References |
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========== |
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[ 1 ] CVE-2008-1199 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1199 |
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[ 2 ] CVE-2008-1218 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1218 |
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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-200803-25.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 2008 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/2.5 |
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