To get more information, please visit our blog and immediately refer to the May 2019 advisory.

Upon resolution we have consistently communicated with customers as recently as late as 2020. Fortinet immediately issued a PSIRT advisory and communicated directly with customers and via corporate blog posts on multiple occasions in August 2019 and July 2020 strongly recommending an upgrade. CVE-2018-13379 is an old vulnerability resolved in May 2019. The security of our customers is our first priority. Security firm Tenable, meanwhile, said that CVE-2020-12812 can result in an exploiter bypassing two-factor authentication and logging in successfully.

Slides from a talk the researchers gave at the Black Hat Security Conference in 2019 describe it as providing “pre-auth arbitrary file reading,” meaning it allows the exploiter to read password databases or other files of interest. One of the most severe security bugs - CVE-2018-13379-was found and disclosed by researchers Orange Tsai and Meh Chang of security firm Devcore. “The attacker can then explore the network, pivot to trying to exploit various internal services, etc.” Advertisement Renken is one of two people credited with discovering a third FortiOS vulnerability-CVE-2019-5591-that Friday’s advisory said was also likely being exploited. if they're Active Directory, LDAP, or similar single sign-on credentials) then the attacker immediately gains access to those services with the privileges of the user whose credentials were stolen,” said James Renken, a site reliability engineer at the Internet Security Research Group. “If the VPN credentials are also shared with other internal services (e.g.

Two of the three already-patched vulnerabilities listed in the advisory-CVE-2018-13379 and CVE-2020-12812-are particularly severe because they make it possible for unauthenticated hackers to steal credentials and connect to VPNs that have yet to be updated. Breaching the moteįortinet FortiOS SSL VPNs are used mainly in border firewalls, which cordon off sensitive internal networks from the public Internet. “Gaining initial access pre-positions the APT actors to conduct future attacks.” APT is short for advanced persistent threat, a term used to describe well-organized and well-funded hacking groups, many backed by nation states. “APT actors may use these vulnerabilities or other common exploitation techniques to gain initial access to multiple government, commercial, and technology services,” the agencies said Friday in a joint advisory. The FBI and the Cybersecurity and Infrastructure Security Agency said that advanced hackers are likely exploiting critical vulnerabilities in the Fortinet FortiOS VPN in an attempt to plant a beachhead to breach medium and large-sized businesses in later attacks.

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