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Family: Gentoo Local Security Checks --> Category: infos

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

Vulnerability Scan Summary
Fetchmail: Denial of Service and password disclosure

Detailed Explanation for this Vulnerability Test
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.


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.


There is no known workaround at this time.


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

Threat Level: Medium

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