CVE-2021-31855 Information disclosure in n/a
KDE Messagelib leaks cleartext of encrypted messages to remote servers when attachments are deleted, allowing attackers with server access to read sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-31855?
CVE-2021-31855 is a medium-severity vulnerability in n/a, published on 2 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
KDE Messagelib through 5.17.0 reveals cleartext of encrypted messages in some situations. Deleting an attachment of a decrypted encrypted message stored on a remote server (e.g., an IMAP server) causes KMail to upload the decrypted content of the message to the remote server. With a crafted message, a user could be tricked into decrypting an encrypted message and then deleting an attachment attached to this 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. This occurs in ViewerPrivate::deleteAttachment in messageviewer/src/viewer/viewer_p.cpp.
Weakness: CWE-312
Which versions are affected by CVE-2021-31855?
It affects 1 product.
Products include Kde Messagelib.
How do I fix CVE-2021-31855?
Apply the vendor's patch.
Is CVE-2021-31855 being exploited?
There is no known exploitation of CVE-2021-31855 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2021-31855, GHSA-h76g-vp43-8cw5, MGASA-2021-0208, UBUNTU-CVE-2021-31855.