First published: Thu Mar 29 2018(Updated: )
Mail. An issue existed in the handling of S/MIME HTML e-mail. This issue was addressed by not loading remote resources on S/MIME encrypted messages by default if the message has an invalid or missing S/MIME signature.
Credit: Damian Poddebniak MChristian Dresen MJens Müller Ruhr University BochumFabian Ising MSebastian Schinzel MSimon Friedberger KU LeuvenJuraj Somorovsky Ruhr University BochumJörg Schwenk Ruhr University Bochum product-security@apple.com
Affected Software | Affected Version | How to fix |
---|---|---|
Apple Mac OS X | <10.13.4 | |
Apple macOS High Sierra | <10.13.4 | 10.13.4 |
Apple Sierra | ||
Apple El Capitan |
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(Found alongside the following vulnerabilities)
CVE-2018-4111 is a vulnerability that exists in the handling of S/MIME HTML e-mail in certain Apple products, specifically macOS before version 10.13.4.
CVE-2018-4111 allows man-in-the-middle attackers to read S/MIME encrypted message content in the 'Mail' component of affected Apple products.
macOS versions before 10.13.4 are affected by CVE-2018-4111.
The severity of CVE-2018-4111 is medium, with a CVSSv3 base score of 5.9.
To mitigate CVE-2018-4111, update macOS to version 10.13.4 or later.