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[ GLSA 200812-16 ] Dovecot: Multiple vulnerabilities
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PostPosted: Sun Dec 14, 2008 10:26 pm    Post subject: [ GLSA 200812-16 ] Dovecot: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: Dovecot: Multiple vulnerabilities (GLSA 200812-16)
Severity: normal
Exploitable: remote
Date: December 14, 2008
Bug(s): #240409, #244962, #245316
ID: 200812-16

Synopsis

Multiple vulnerabilities were found in the Dovecot mailserver.

Background

Dovecot is an IMAP and POP3 server written with security primarily in mind.

Affected Packages

Package: net-mail/dovecot
Vulnerable: < 1.1.7-r1
Unaffected: >= 1.1.7-r1
Architectures: All supported architectures


Description

Several vulnerabilities were found in Dovecot:
  • The "k" right in the acl_plugin does not work as expected (CVE-2008-4577, CVE-2008-4578)
  • The dovecot.conf is world-readable, providing improper protection for the ssl_key_password setting (CVE-2008-4870)
  • A permanent Denial of Service with broken mail headers is possible (CVE-2008-4907)


Impact

These vulnerabilities might allow a remote attacker to cause a Denial of Service, to circumvent security restrictions or allow local attackers to disclose the passphrase of the SSL private key.

Workaround

There is no known workaround at this time.

Resolution

All Dovecot users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/dovecot-1.1.7-r1"
Users should be aware that dovecot.conf will still be world-readable after the update. If employing ssl_key_password, it should not be used in dovecot.conf but in a separate file which should be included with "include_try".

References

CVE-2008-4577
CVE-2008-4578
CVE-2008-4870
CVE-2008-4907
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