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mydnshost / mydnshost-api

API Backend for mydnshost
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[Security] Bump phpmailer/phpmailer from 6.1.5 to 6.1.6 #104

Closed dependabot-preview[bot] closed 4 years ago

dependabot-preview[bot] commented 4 years ago

Bumps phpmailer/phpmailer from 6.1.5 to 6.1.6. This update includes a security fix.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Insufficient output escaping of attachment names in PHPMailer

Impact

CWE-116: Incorrect output escaping.

An attachment added like this (note the double quote within the attachment name, which is entirely valid):

$mail->addAttachment('/tmp/attachment.tmp', 'filename.html";.jpg');

Will result in a message containing these headers:

Content-Type: application/octet-stream; name="filename.html";.jpg"
Content-Disposition: attachment; filename="filename.html";.jpg"

The attachment will be named filename.html, and the trailing ";.jpg" will be ignored. Mail filters that reject .html attachments but permit .jpg attachments may be fooled by this.

Note that the MIME type itself is obtained automatically from the source filename (in this case attachment.tmp, which maps to a generic application/octet-stream type), and not the name given to the attachment (though these are the same if a separate name is not provided), though it can be set explicitly in other parameters to attachment methods.

Patches

Patched in PHPMailer 6.1.6 by escaping double quotes within the name using a backslash, as per RFC822 section 3.4.1, resulting in correctly escaped headers like this:

Content-Type: application/octet-stream; name="filename.html\";.jpg"
... (truncated)

Affected versions: < 6.1.6

Release notes

Sourced from phpmailer/phpmailer's releases.

PHPMailer 6.1.6

This is a security release, with some other minor changes. For full details, refer to the advisory.

  • SECURITY Fix insufficient output escaping bug in file attachment names. CVE-2020-13625. Reported by Elar Lang of Clarified Security.
  • Correct Armenian ISO language code from am to hy, add mapping for fallback
  • Use correct timeout property in debug output
Changelog

Sourced from phpmailer/phpmailer's changelog.

Version 6.1.6 (May 27th, 2020)

  • SECURITY Fix insufficient output escaping bug in file attachment names. CVE-2020-13625. Reported by Elar Lang of Clarified Security.
  • Correct Armenian ISO language code from am to hy, add mapping for fallback
  • Use correct timeout property in debug output
Commits


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