Information disclosure in kmail and messagelib - CVE-2021-31855

Vulnerability details

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the way messagelib in KDE KMail deletes attachments of encrypted messages on a remote server (e.g. an IMAP server). A remote attacker can send a victim a specially crafted encrypted message and trick the victim into deleting an attachments from such message. If the attacker has access to the messages stored on the email server, then the attacker could read the decrypted content of the encrypted message.

Affected software

How to mitigate CVE-2021-31855

External References

• https://kde.org/info/security/advisory-20210429-1.txt

Related Security Bulletins

• Encrypted messages contents disclosure in KDE KMail