CVE-2019-10740 : What You Need to Know
Learn about CVE-2019-10740 affecting Roundcube Webmail. Attackers can exploit encrypted emails, potentially leading to plaintext disclosure. Find mitigation steps here.
Roundcube Webmail before version 1.3.10 allows attackers to manipulate encrypted emails using S/MIME or PGP, potentially leading to plaintext disclosure.
Understanding CVE-2019-10740
An issue has been identified in Roundcube Webmail versions prior to 1.3.10, allowing attackers to exploit encrypted emails.
What is CVE-2019-10740?
Attackers can manipulate encrypted emails by incorporating them as sub-parts within a multipart email, concealing them using techniques like HTML/CSS or ASCII newline characters.
The Impact of CVE-2019-10740
By sending a modified multipart email to the recipient, attackers can trick them into unknowingly disclosing the plaintext of encrypted message parts.
Technical Details of CVE-2019-10740
Roundcube Webmail vulnerability details.
Vulnerability Description
Attackers can manipulate encrypted emails within multipart emails, potentially leading to plaintext disclosure.
Affected Systems and Versions
- Product: Roundcube Webmail
- Versions affected: Prior to 1.3.10
Exploitation Mechanism
- Attackers incorporate encrypted emails as sub-parts in a multipart email.
- Conceal encrypted parts using HTML/CSS or ASCII newline characters.
Mitigation and Prevention
Protecting against CVE-2019-10740.
Immediate Steps to Take
- Upgrade Roundcube Webmail to version 1.3.10 or later.
- Avoid responding to suspicious or unexpected emails.
Long-Term Security Practices
- Regularly update software and security patches.
- Educate users on email security best practices.
Patching and Updates
- Apply patches and updates provided by Roundcube Webmail to address this vulnerability.