USN-7731-1

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USN-7731-1

Summary: kmail vulnerabilities

Details: Damian Poddebniak, Christian Dresen, Jens Müller, Fabian Ising, Sebastian Schinzel, Simon Friedberger, Juraj Somorovsky, and Jörg Schwenk discovered that KMail could be made to leak the plaintext of S/MIME encrypted emails when retrieving external content in emails. Under certain configurations, if a user were tricked into opening a specially crafted email, an attacker could possibly use this issue to obtain the plaintext of an encrypted email. This update mitigates the issue by preventing KMail from automatically loading external content. This issue only affected Ubuntu 18.04 LTS. (CVE-2017-17689) It was discovered that KMail could be made to attach files to an email without the user's knowledge. If a user were tricked into sending an email created by a specially crafted "mailto" link, an attacker could possibly use this issue to obtain sensitive files. (CVE-2020-11880)

References: https://ubuntu.com/security/notices/USN-7731-1, https://ubuntu.com/security/CVE-2017-17689, https://ubuntu.com/security/CVE-2020-11880