The update{_bad,}_phishing_sites scripts in mailscanner 4.79.11-2 downloads files and trusts them without using encryption (e.g., https) or digital signature checking which could allow an attacker to replace certain configuration files (e.g., phishing whitelist) via dns/packet spoofing.

mailscanner before 4.79.11-2.1 might allow local users to overwrite arbitrary files via a symlink attack on certain temporary files. NOTE: this issue exists because of an incomplete fix for CVE-2008-5313.

mailscanner can allow local users to prevent virus signatures from being updated

Directory traversal vulnerability in docs.php in MailWatch for MailScanner 1.0.4 and earlier allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the doc parameter.

mailscanner 4.68.8 and other versions before 4.74.16-1 might allow local users to overwrite arbitrary files via a symlink attack on certain temporary files used by the (1) f-prot-autoupdate, (2) clamav-autoupdate, (3) avast-autoupdate, and (4) f-prot-6-autoupdate scripts in /etc/MailScanner/autoupdate/; the (5) bitdefender-wrapper, (6) kaspersky-wrapper, (7) clamav-wrapper, and (8) rav-wrapper scripts in /etc/MailScanner/wrapper/; the (9) Quarantine.pm, (10) TNEF.pm, (11) MessageBatch.pm, (12) WorkArea.pm, and (13) SA.pm scripts in /usr/share/MailScanner/MailScanner/; (14) /usr/sbin/MailScanner; and (15) scripts that load the /etc/MailScanner/mailscanner.conf.with.mcp configuration file.

mailscanner 4.55.10 and other versions before 4.74.16-1 might allow local users to overwrite arbitrary files via a symlink attack on certain temporary files used by the (1) f-prot-autoupdate, (2) clamav-autoupdate, (3) panda-autoupdate.new, (4) trend-autoupdate.new, and (5) rav-autoupdate.new scripts in /etc/MailScanner/autoupdate/, a different vulnerability than CVE-2008-5140.

SQL injection vulnerability in in the authenticate function in MailWatch for MailScanner 1.0.2 allows remote attackers to execute arbitrary SQL commands.

Directory traversal vulnerability in the ruleset view for MailWatch for MailScanner 1.0.2 allows remote attackers to access arbitrary files.

Unknown vulnerability in MailScanner 4.41.3 and earlier, related to "incomplete reporting of viruses in zip files," allows remote attackers to bypass virus detection.

MailScanner before 4.0 5-1 and before 3.2 6-1 allows remote attackers to bypass protection via attachments with a filename with (1) extra leading spaces, (2) extra trailing spaces, or (3) alternate character encodings that cannot be processed by MailScanner.