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Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200701-13] Fetchmail: Denial of Service and password disclosure

Vulnerability Assessment Details

[GLSA-200701-13] Fetchmail: Denial of Service and password disclosure

Vulnerability Assessment Summary
Fetchmail: Denial of Service and password disclosure

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200701-13
(Fetchmail: Denial of Service and password disclosure)

Neil Hoggarth has discovered that when delivering messages to a message
delivery agent by means of the "mda" option, Fetchmail passes a NULL
pointer to the ferror() and fflush() functions when refusing a message.
Isaac Wilcox has discovered numerous means of plain-text password
disclosure due to errors in secure connection establishment.

Impact

A possible hacker could deliver a message via Fetchmail to a message delivery
agent configured to refuse the message, and crash the Fetchmail
process. SMTP and LMTP delivery modes are not affected by this
vulnerability. A possible hacker could also perform a Man-in-the-Middle
attack, and obtain plain-text authentication credentials of users
connecting to a Fetchmail process.

Workaround

There is no known workaround at this time.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5867
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5974

Solution:
All fetchmail users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/fetchmail-6.3.6"

Network Security Threat Level: Medium

Networks Security ID:

Vulnerability Assessment Copyright: (C) 2007 Michel Arboi

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