CVE-2017-5223 Local file disclosure in PHPMailer
Attackers can read arbitrary local files by supplying crafted HTML to PHPMailer's msgHTML method without a base directory, exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-5223?
CVE-2017-5223 is a medium-severity vulnerability in n/a, published on 16 Jan 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue was discovered in PHPMailer before 5.2.22. PHPMailer's msgHTML method applies transformations to an HTML document to make it usable as an email message body. One of the transformations is to convert relative image URLs into attachments using a script-provided base directory. If no base directory is provided, it resolves to /, meaning that relative image URLs get treated as absolute local file paths and added as attachments. To form a remote vulnerability, the msgHTML method must be called, passed an unfiltered, user-supplied HTML document, and must not set a base directory.
Weakness: CWE-200
Which versions are affected by CVE-2017-5223?
2 open source packages ship an affected version, including phpmailer/phpmailer. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
phpmailer/phpmailer Packagist | From 5.0.0 | 5.2.22 |
phpmailer/phpmailer Packagist | From 5.0.0 | 5.2.22 |
Products include Phpmailer Project Phpmailer.
How do I fix CVE-2017-5223?
Upgrade phpmailer/phpmailer to 5.2.22 or later.
Is CVE-2017-5223 being exploited?
There is no known exploitation of CVE-2017-5223 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry and 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2017-5223, DLA-817-1, GHSA-4x5h-cr29-fhp6, UBUNTU-CVE-2017-5223.