TrueConf Server Flaws Exploited to Replace Client Installers with PhantomCore

The threat actor known as Head Mare has been observed weaponizing security flaws in unpatched TrueConf servers once again in attacks targeting Russian companies spanning instrumentation, electronics, transport, energy, IT, and software development sectors. Russian cybersecurity vendor Kaspersky...

The vulnerability of the TrueConf software lies in its lack of mechanisms to limit the number of authentication attempts. This allows a violator to lock out a user’s account.

The vulnerability of the TrueConf software is related to deficiencies in the mechanism for limiting the number of authentication attempts. Exploiting this vulnerability could allow a malicious actor to lock out a user’s account by attempting more than 10 unsuccessful password entries...