Information disclosure in messagelib and kmail - CVE-2021-31855
Published: April 29, 2021
Vulnerability identifier: #VU52766
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-31855
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: KDE.org
Affected software:
messagelib
kmail
messagelib
kmail
Detailed vulnerability description
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.
How to mitigate CVE-2021-31855
Install updates from vendor's website.