The mail transport (aka Swift_Transport_MailTransport) in Swift Mailer before 5.4.5 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a " (backslash double quote) in a crafted e-mail address in the (1) From, (2) ReturnPath, or (3) Sender header.

References

• https://nvd.nist.gov/vuln/detail/CVE-2016-10074
• https://github.com/swiftmailer/swiftmailer/blob/5.x/CHANGES
• https://legalhackers.com/advisories/SwiftMailer-Exploit-Remote-Code-Exec-CVE-2016-10074-Vuln.html
• http://packetstormsecurity.com/files/140290/SwiftMailer-Remote-Code-Execution.html
• http://seclists.org/fulldisclosure/2016/Dec/86
• http://www.debian.org/security/2017/dsa-3769
• http://www.securityfocus.com/bid/95140
• https://github.com/FriendsOfPHP/security-advisories/blob/master/swiftmailer/swiftmailer/CVE-2016-10074.yaml
• https://www.exploit-db.com/exploits/40972
• https://www.exploit-db.com/exploits/40986
• https://www.exploit-db.com/exploits/42221