The third problem is a failure for AntiTrack to honor browser cipher suites or Forward Secrecy, a means to ensure session keys are not compromised.Įade disclosed the security problems to Avast on August 7, 2019.
Avast certificate error thunderbird software#
Even if a web server supports TLS 1.2, the software will ignore these settings and make connections to TLS 1.0 websites - and when it comes to browsers that have been configured to only reach websites supporting the higher standard, Avast's software should not ignore such direction. The second security problem outlined by the researcher is how Avast AntiTrack downgrades browser security protocols to TLS 1.0. In these cases, self-signed, malicious certificates may be missed, permitting attackers to launch MiTM attacks.
The first issue has been caused by a failure to check the validity of certificates presented to end servers. However, a set of three security failures undermined these goals.
A vulnerability impacting Avast and AVG AntiTrack privacy software opened up user PCs to Man-in-The-Middle attacks, browser session hijack, and data theft.ĭisclosed by David Eade on March 9, the security researcher said the security flaw, tracked as CVE-2020-8987, is a certification validation issue that affects Avast AntiTrack before 1.5.1.172 and AVG AntiTrack before 2.0.0.178.Īttackers do not need local access to trigger the vulnerability, and no special software configuration needs to be in place.Īvast's AntiTrack software is designed to block advertising trackers and to prevent "invasive" monitoring of your online habits.
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