GitHub Advisory DatabaseGHSA-4PC3-96MX-WWC8Remote code execution in PHPMailer
0.967 High
EPSS
Percentile
99.6%
Impact
The isMail transport in PHPMailer before 5.2.20 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code by leveraging improper interaction between the escapeshellarg function and internal escaping performed in the mail function in PHP. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-10033.
This issue really emphasises that it's worth avoiding the built-in PHP mail() function entirely.
Patches
Fixed in 5.2.20
Workarounds
Send via SMTP to localhost instead of calling the mail() function.
References
https://nvd.nist.gov/vuln/detail/CVE-2016-10045
See also https://nvd.nist.gov/vuln/detail/CVE-2016-10033
For more information
If you have any questions or comments about this advisory:
- Open a private issue in the PHPMailer project
| CPE | Name | Operator | Version |
|---|---|---|---|
| phpmailer/phpmailer | lt | 5.2.20 |
References
openwall.com/lists/oss-security/2016/12/28/1
packetstormsecurity.com/files/140286/PHPMailer-Remote-Code-Execution.html
packetstormsecurity.com/files/140350/PHPMailer-Sendmail-Argument-Injection.html
seclists.org/fulldisclosure/2016/Dec/81
www.rapid7.com/db/modules/exploit/multi/http/phpmailer_arg_injection
www.securityfocus.com/archive/1/539967/100/0/threaded
www.securityfocus.com/bid/95130
www.securitytracker.com/id/1037533
developer.joomla.org/security-centre/668-20161205-phpmailer-security-advisory.html
github.com/advisories/GHSA-4pc3-96mx-wwc8
github.com/FriendsOfPHP/security-advisories/blob/master/phpmailer/phpmailer/CVE-2016-10045.yaml
github.com/PHPMailer/PHPMailer/releases/tag/v5.2.20
github.com/PHPMailer/PHPMailer/security/advisories/GHSA-4pc3-96mx-wwc8
github.com/PHPMailer/PHPMailer/wiki/About-the-CVE-2016-10033-and-CVE-2016-10045-vulnerabilities
legalhackers.com/advisories/PHPMailer-Exploit-Remote-Code-Exec-CVE-2016-10045-Vuln-Patch-Bypass.html
nvd.nist.gov/vuln/detail/CVE-2016-10045
www.exploit-db.com/exploits/40969/
www.exploit-db.com/exploits/40986/
www.exploit-db.com/exploits/42221/
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