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Gentoo Linux Security Advisory GLSA 200701-13 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Fetchmail: Denial of Service and password disclosure |
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Date: January 22, 2007 |
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Bugs: #160463 |
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ID: 200701-13 |
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Synopsis |
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======== |
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|
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Fetchmail has been found to have numerous vulnerabilities allowing for |
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Denial of Service and password disclosure. |
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Background |
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========== |
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Fetchmail is a remote mail retrieval and forwarding utility. |
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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 < 6.3.6 >= 6.3.6 |
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Description |
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=========== |
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|
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Neil Hoggarth has discovered that when delivering messages to a message |
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delivery agent by means of the "mda" option, Fetchmail passes a NULL |
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pointer to the ferror() and fflush() functions when refusing a message. |
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Isaac Wilcox has discovered numerous means of plain-text password |
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disclosure due to errors in secure connection establishment. |
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Impact |
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====== |
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An attacker could deliver a message via Fetchmail to a message delivery |
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agent configured to refuse the message, and crash the Fetchmail |
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process. SMTP and LMTP delivery modes are not affected by this |
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vulnerability. An attacker could also perform a Man-in-the-Middle |
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attack, and obtain plain-text authentication credentials of users |
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connecting to a Fetchmail process. |
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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 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-6.3.6" |
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References |
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========== |
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[ 1 ] CVE-2006-5867 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5867 |
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[ 2 ] CVE-2006-5974 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5974 |
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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-200701-13.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 2007 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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