postfix_groups.pl in Postfix 2.5.2 allows local users to overwrite arbitrary files via a symlink attack on the (1) /tmp/postfix_groups.stdout, (2) /tmp/postfix_groups.stderr, and (3) /tmp/postfix_groups.message temporary files. NOTE: the vendor disputes this vulnerability, stating "This is not a real issue ... users would have to edit a script under /usr/lib to enable it.

postfix

The Postfix configuration file in Mac OS X 10.5.5 causes Postfix to be network-accessible when mail is sent from a local command-line tool, which allows remote attackers to send mail to local Mac OS X users.

apple

Postfix 2.4 before 2.4.9, 2.5 before 2.5.5, and 2.6 before 2.6-20080902, when used with the Linux 2.6 kernel, leaks epoll file descriptors during execution of "non-Postfix" commands, which allows local users to cause a denial of service (application slowdown or exit) via a crafted command, as demonstrated by a command in a .forward file.

linux · postfix

Postfix 2.5 before 2.5.4 and 2.6 before 2.6-20080814 delivers to a mailbox file even when this file is not owned by the recipient, which allows local users to read e-mail messages by creating a mailbox file corresponding to another user's account name.

postfix

Postfix before 2.3.15, 2.4 before 2.4.8, 2.5 before 2.5.4, and 2.6 before 2.6-20080814, when the operating system supports hard links to symlinks, allows local users to append e-mail messages to a file to which a root-owned symlink points, by creating a hard link to this symlink and then sending a message. NOTE: this can be leveraged to gain privileges if there is a symlink to an init script.

postfix

Buffer overflow in the w_read function in sockets.c in Cami Sardinha and Nigel Kukard policyd before 1.81 for Postfix allows remote attackers to cause a denial of service and possibly execute arbitrary code via long SMTP commands. NOTE: some of these details are obtained from third party information.

policyd

Kolab Server 2.0.1, 2.0.2 and development versions pre-2.1-20051215 and earlier, when authenticating users via secure SMTP, stores authentication credentials in plaintext in the postfix.log file, which allows local users to gain privileges.

kolab

Postfix 2.1.3, when /proc/net/if_inet6 is not available and permit_mx_backup is enabled in smtpd_recipient_restrictions, allows remote attackers to bypass e-mail restrictions and perform mail relaying by sending mail to an IPv6 hostname.

wietse_venema · redhat · suse

Format string vulnerability in the log function in Net::Server 0.87 and earlier, as used in Postfix Greylisting Policy Server (Postgrey) 1.18 and earlier, and possibly other products, allows remote attackers to cause a denial of service (crash) via format string specifiers that are not properly handled before being sent to syslog, as demonstrated using sender addresses to Postgrey.

postgrey

Postfix on Mac OS X 10.3.x through 10.3.5, with SMTPD AUTH enabled, does not properly clear the username between authentication attempts, which allows users with the longest username to prevent other valid users from being able to authenticate.

apple

SQL injection vulnerability in SQLgrey Postfix greylisting service before 1.2.0 allows remote attackers to execute arbitrary SQL commands via the (1) sender or (2) recipient e-mail addresses.

sqlgrey

Postfix server for Apple Mac OS X 10.3.6, when using CRAM-MD5, allows remote attackers to send mail without authentication by replaying authentication information.

apple

The address parser code in Postfix 1.1.12 and earlier allows remote attackers to cause a denial of service (lock) via (1) a malformed envelope address to a local host that would generate a bounce and contains the ".!" string in the MAIL FROM or Errors-To headers, which causes nqmgr to lock up, or (2) via a valid MAIL FROM with a RCPT TO containing a ".!" string, which causes an instance of the SMTP listener to lock up.

wietse_venema · conectiva

Postfix 1.1.11 and earlier allows remote attackers to use Postfix to conduct "bounce scans" or DDos attacks of other hosts via an email address to the local host containing the target IP address and service name followed by a "!" string, which causes Postfix to attempt to use SMTP to communicate with the target on the associated port.

wietse_venema · conectiva

Vulnerability in Postfix SMTP server before 20010228-pl07, when configured to email the postmaster when SMTP errors cause the session to terminate, allows remote attackers to cause a denial of service (memory exhaustion) by generating a large number of SMTP errors, which forces the SMTP session log to grow too large.

wietse_venema