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Gentoo Linux Security Advisory GLSA 200507-21 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: fetchmail: Buffer Overflow |
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Date: July 25, 2005 |
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Bugs: #99865 |
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ID: 200507-21 |
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Synopsis |
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======== |
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|
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fetchmail is susceptible to a buffer overflow resulting in a Denial of |
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Service or arbitrary code execution. |
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Background |
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========== |
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|
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fetchmail is a utility that retrieves and forwards mail from remote |
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systems using IMAP, POP, and other protocols. |
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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 < 6.2.5.2 >= 6.2.5.2 |
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Description |
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=========== |
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|
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fetchmail does not properly validate UIDs coming from a POP3 mail |
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server. The UID is placed in a fixed length buffer on the stack, which |
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can be overflown. |
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Impact |
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====== |
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|
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Very long UIDs returned from a malicious or compromised POP3 server can |
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cause fetchmail to crash, resulting in a Denial of Service, or allow |
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arbitrary code to be placed on the stack. |
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Workaround |
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========== |
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There are no known workarounds at this time. |
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Resolution |
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========== |
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All fetchmail users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-mail/fetchmail-6.2.5.2" |
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|
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References |
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========== |
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[ 1 ] Fetchmail Security Advisory |
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http://fetchmail.berlios.de/fetchmail-SA-2005-01.txt |
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[ 2 ] CAN-2005-2335 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2335 |
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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-200507-21.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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|
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License |
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======= |
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Copyright 2005 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/2.0 |
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