Mailutils: Multiple vulnerabilities in imap4d and mail — GLSA 200505-20

The imap4d server and the mail utility from GNU Mailutils contain multiple vulnerabilities, potentially allowing a remote attacker to execute arbitrary code with root privileges.

Affected packages

net-mail/mailutils on all architectures
Affected versions < 0.6-r1
Unaffected versions >= 0.6-r1


GNU Mailutils is a collection of mail-related utilities, including an IMAP4 server (imap4d) and a Mail User Agent (mail).


infamous41d discovered several vulnerabilities in GNU Mailutils. imap4d does not correctly implement formatted printing of command tags (CAN-2005-1523), fails to validate the range sequence of the "FETCH" command (CAN-2005-1522), and contains an integer overflow in the "fetch_io" routine (CAN-2005-1521). mail contains a buffer overflow in "header_get_field_name()" (CAN-2005-1520).


A remote attacker can exploit the format string and integer overflow in imap4d to execute arbitrary code as the imap4d user, which is usually root. By sending a specially crafted email message, a remote attacker could exploit the buffer overflow in the "mail" utility to execute arbitrary code with the rights of the user running mail. Finally, a remote attacker can also trigger a Denial of Service by sending a malicious FETCH command to an affected imap4d, causing excessive resource consumption.


There are no known workarounds at this time.


All GNU Mailutils users should upgrade to the latest available version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-mail/mailutils-0.6-r1"


Release date
May 27, 2005

Latest revision
May 27, 2005: 01



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