Vulnerability identifier: #VU34443

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11880

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
kmail
Client/Desktop applications / Other client software

Vendor: KDE.org

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

An issue was discovered in KDE KMail before 19.12.3. By using the proprietary (non-RFC6068) "mailto?attach=..." parameter, a website (or other source of mailto links) can make KMail attach local files to a composed email message without showing a warning to the user, as demonstrated by an attach=.bash_history value.

Mitigation
Install update from vendor's website.

Vulnerable software versions

kmail: 19.12.0 - 19.12.2

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External links
http://cgit.kde.org/kmail.git/commit/?id=2a348eccd352260f192d9b449492071bbf2b34b1
http://cgit.kde.org/kmail.git/tag/?h=v19.12.3

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.