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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTRwYzMtOTZteC13d2M4
Remote code execution in PHPMailer
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
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTRwYzMtOTZteC13d2M4
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: almost 5 years ago
Updated: over 1 year ago
CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Percentage: 0.89178
EPSS Percentile: 0.98984
Identifiers: GHSA-4pc3-96mx-wwc8, CVE-2016-10045
References:
- https://github.com/PHPMailer/PHPMailer/security/advisories/GHSA-4pc3-96mx-wwc8
- https://nvd.nist.gov/vuln/detail/CVE-2016-10045
- https://developer.joomla.org/security-centre/668-20161205-phpmailer-security-advisory.html
- https://github.com/FriendsOfPHP/security-advisories/blob/master/phpmailer/phpmailer/CVE-2016-10045.yaml
- https://github.com/PHPMailer/PHPMailer/releases/tag/v5.2.20
- https://github.com/PHPMailer/PHPMailer/wiki/About-the-CVE-2016-10033-and-CVE-2016-10045-vulnerabilities
- https://legalhackers.com/advisories/PHPMailer-Exploit-Remote-Code-Exec-CVE-2016-10045-Vuln-Patch-Bypass.html
- https://www.exploit-db.com/exploits/40969/
- https://www.exploit-db.com/exploits/40986/
- https://www.exploit-db.com/exploits/42221/
- http://openwall.com/lists/oss-security/2016/12/28/1
- http://packetstormsecurity.com/files/140286/PHPMailer-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/140350/PHPMailer-Sendmail-Argument-Injection.html
- http://seclists.org/fulldisclosure/2016/Dec/81
- http://www.rapid7.com/db/modules/exploit/multi/http/phpmailer_arg_injection
- http://www.securityfocus.com/archive/1/539967/100/0/threaded
- http://www.securityfocus.com/bid/95130
- http://www.securitytracker.com/id/1037533
- https://github.com/advisories/GHSA-4pc3-96mx-wwc8
Blast Radius: 42.0
Affected Packages
packagist:phpmailer/phpmailer
Dependent packages: 1,306Dependent repositories: 19,318
Downloads: 73,642,493 total
Affected Version Ranges: >= 5.0.0, < 5.2.20
Fixed in: 5.2.20
All affected versions: 5.2.2, 5.2.4, 5.2.5, 5.2.6, 5.2.7, 5.2.8, 5.2.9, 5.2.10, 5.2.11, 5.2.12, 5.2.13, 5.2.14, 5.2.15, 5.2.16, 5.2.17, 5.2.18, 5.2.19
All unaffected versions: 5.2.20, 5.2.21, 5.2.22, 5.2.23, 5.2.24, 5.2.25, 5.2.26, 5.2.27, 5.2.28, 6.0.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4, 6.0.5, 6.0.6, 6.0.7, 6.1.0, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.1.5, 6.1.6, 6.1.7, 6.1.8, 6.2.0, 6.3.0, 6.4.0, 6.4.1, 6.5.0, 6.5.1, 6.5.2, 6.5.3, 6.5.4, 6.6.0, 6.6.1, 6.6.2, 6.6.3, 6.6.4, 6.6.5, 6.7.1, 6.8.0, 6.8.1, 6.9.0, 6.9.1, 6.9.2, 6.9.3