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Hackers actively exploit high-severity networking vulnerabilities

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Hackers are actively exploiting two unrelated high-severity vulnerabilities that allow unauthenticated access or even a complete takeover of networks run by Fortune 500 companies and government organizations.

The most serious exploits are targeting a critical vulnerability in F5s Big-IP advanced delivery controller, a device thats typically placed between a perimeter firewall and a Web application to handle load balancing and other tasks. The vulnerability, which F5 patched three weeks ago, allows unauthenticated attackers to remotely run commands or code of their choice. Attackers can then use their control of the device to hijack the internal network its connected to.

Prescient

The presence of a remote code execution flaw in a device located in such a sensitive part of a network gave the vulnerability a maximum severity rating of 10. Immediately after F5 released a patch on June 30, security practitioners predicted that the flaw—which is tracked as CVE-2020-5902—would be exploited against any vulnerable networks that didnt quickly install the update. On Friday, the US Cybersecurity and Infrastructure Security Agency (CISA) issued an advisory that proved those warnings prescient.

“CISA has conducted incident response engagements at US Government and commercial entities where malicious cyber threat actors have exploited CVE-2020-5902—an RCE vulnerability in the BIG-IP Traffic Management User Interface (TMUI)—to take control of victim systems,” the advisory stated.

Officials continued:

CISA has observed scanning and reconnaissance, as well as confirmed compromises, within a few days of F5s patch release for this vulnerability. As early as July 6, 2020, CISA has seen broad scanning activity for the presence of this vulnerability across federal departments and agencies—this activity is currently occurring as of the publication of this Alert.

CISA has been working with several entities across multiple sectors to investigate potential compromises relating to this vulnerability. CISA has confirmed two compromises and is continuing to investigate. CISA will update this Alert with any additional actionable information.

Et tu, Cisco?

Attackers are exploiting a second vulnerability found in two network products sold by Cisco. Tracked as CVE-2020-3452, the path-traversal flaw resides in the companys Adaptive Security Appliance and Firepower Threat Defense systems. It allows unauthenticated people to remotely view sensitive files that, among other things, can disclose WebVPN configurations, bookRead More – Source

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