A vulnerability in GNOME WebKitGTK could allow an unauthenticated, remote attacker to conduct a deanonymization attack on a targeted system.
The vulnerability exists because the affected software fails to properly apply configured HTTP proxy settings when downloading livestream video. An attacker could exploit this vulnerability to perform a deanonymization attack on a targeted system. A successful exploit could allow the attacker to conduct further attacks.
GNOME has confirmed the vulnerability and released software updates.
GNOME corrected this vulnerability by changing the way livestreams are downloaded.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators are advised to monitor affected systems.
GNOME has released a security advisory at the following link: WSA-2019-0002
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.