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3 SSL VPN vulnerabilities disclosed in 2019 are still routinely exploited

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Vulnerabilities in SSL VPN merchandise are one of the crucial maximum exploited by way of attackers for preliminary get admission to to focus on networks, appearing as a doorway for exploitation. Previous this yr, Tenable Analysis named 3 VPN vulnerabilities as a part of its Most sensible 5 Vulnerabilities of 2020. Despite the fact that all 3 vulnerabilities (CVE-2019-19781, CVE-2019-11510, CVE-2018-13379) had been disclosed in 2019 and patched by way of January 2020, they remain automatically exploited greater than midway via 2021.

According to Tenable Analysis’s research of seller advisories, govt warnings, and business knowledge, the crew re-examined how attackers have traditionally exploited those vulnerabilities, together with new studies of assaults, in 2021.

A number of risk teams were identified to leverage CVE-2019-19781 — a trail or listing traversal flaw in Citrix ADC, Gateway and SD-WAN WANOP merchandise to focus on the healthcare business. Extra lately, attackers have indicated their choice for this vulnerability in on-line boards between January 2020 and March 2021, because it used to be the highest discussed CVE on Russian and English-speaking darkish internet boards.

In April 2019, Pulse Protected launched an out-of-band safety advisory to handle a couple of vulnerabilities in its Pulse Attach Protected SSL VPN answer. Essentially the most notable one, CVE-2019-11510, an arbitrary record disclosure vulnerability used to be assigned the utmost CVSSv3 rating of 10.zero. Speedy ahead to Q1 2021 — a document from Nuspire confirmed a 1,527% building up in makes an attempt to milk CVE-2019-11510 in opposition to inclined Pulse Attach Protected SSL VPNs. There also are a minimum of 16 malware households which were evolved to milk vulnerabilities in Pulse Attach Protected.

In Might 2019, Fortinet patched a listing traversal vulnerability of their FortiOS SSL VPN, which permits an unauthenticated attacker to get admission to arbitrary gadget recordsdata the use of crafted HTTP requests. Now, assaults leveraging the computer virus greater 1,916% in Q1 2021. Even additional, an April document from Kaspersky ICS CERT published that risk actors used it as an access level into an undertaking community to deploy Cring ransomware.

As a result of SSL VPNs supply a digital doorway into organizations, ransomware teams will proceed to focus on those unpatched flaws till organizations take steps to toughen those access issues by way of patching vulnerabilities in SSL VPN merchandise.

Learn the whole document by way of Tenable Analysis.


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