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Gentoo Linux Security Advisory GLSA 201006-12 |
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http://security.gentoo.org/ |
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|
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Severity: Normal |
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Title: Fetchmail: Multiple vulnerabilities |
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Date: June 01, 2010 |
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Bugs: #280537, #307761 |
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ID: 201006-12 |
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|
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Synopsis |
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======== |
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|
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Multiple vulnerabilities have been reported in Fetchmail, allowing |
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remote attackers to execute arbitrary code or to conduct |
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Man-in-the-Middle attacks. |
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|
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Background |
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========== |
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|
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Fetchmail is a remote mail retrieval and forwarding utility. |
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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/fetchmail < 6.3.14 >= 6.3.14 |
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|
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Description |
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=========== |
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|
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Multiple vulnerabilities have been reported in Fetchmail: |
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|
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* The sdump() function might trigger a heap-based buffer overflow |
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during the escaping of non-printable characters with the high bit set |
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from an X.509 certificate (CVE-2010-0562). |
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|
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* The vendor reported that Fetchmail does not properly handle Common |
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Name (CN) fields in X.509 certificates that contain an ASCII NUL |
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character. Specifically, the processing of such fields is stopped at |
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the first occurrence of a NUL character. This type of vulnerability |
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was recently discovered by Dan Kaminsky and Moxie Marlinspike |
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(CVE-2009-2666). |
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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 entice a user to connect with Fetchmail to a |
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specially crafted SSL-enabled server in verbose mode, possibly |
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resulting in the execution of arbitrary code with the privileges of the |
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user running the application. NOTE: The issue is only existent on |
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platforms on which char is signed. |
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|
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Furthermore, a remote attacker might employ a specially crafted X.509 |
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certificate, containing a NUL character in the Common Name field to |
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conduct man-in-the-middle attacks on SSL connections made using |
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Fetchmail. |
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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 Fetchmail 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/fetchmail-6.3.14" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2010-0562 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0562 |
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[ 2 ] CVE-2009-2666 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2666 |
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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-201006-12.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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https://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 2010 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 |