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[ GLSA 200701-13 ] Fetchmail: Denial of Service and password disclosure
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PostPosted: Mon Jan 22, 2007 9:26 pm    Post subject: [ GLSA 200701-13 ] Fetchmail: Denial of Service and password Reply with quote

Gentoo Linux Security Advisory

Title: Fetchmail: Denial of Service and password disclosure (GLSA 200701-13)
Severity: normal
Exploitable: remote
Date: January 22, 2007
Bug(s): #160463
ID: 200701-13

Synopsis

Fetchmail has been found to have numerous vulnerabilities allowing for Denial of Service and password disclosure.

Background

Fetchmail is a remote mail retrieval and forwarding utility.

Affected Packages

Package: net-mail/fetchmail
Vulnerable: < 6.3.6
Unaffected: >= 6.3.6
Architectures: All supported architectures


Description

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

An attacker 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. An attacker 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.

Resolution

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


References

CVE-2006-5867
CVE-2006-5974
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