SB2020051106 - Secuirty restrictions bypass in KDE kio-extras

Description

This security bulletin contains information about 1 security vulnerability.

1) Business Logic Errors (CVE-ID: CVE-2020-12755)

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to kio_fish stores the typed password in KWallet even if the user does not check the Remember box. The vulnerability resides within the fishProtocol::establishConnection in fish/fish.cpp in KDE kio-extras through 20.04.0, which
makes a cacheAuthentication call even if the user had not set the keepPassword option.

This is considered a security issue by users who do not trust KWallet (e.g. because
passwords can be read in KWalletManager, given physical access) as it leads to to unintended KWallet storage of the password.

Remediation

Install update from vendor's website.

References

• https://commits.kde.org/kio-extras/d813cef3cecdec9af1532a40d677a203ff979145
• https://kde.org/info/security/advisory-20200510-1.txt