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Palo Alto Networks Firewalls Focused for Mirrored, Amplified DDoS Assault

By Ionut Arghire on August 11, 2022

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Palo Alto Networks is engaged on fixes for a mirrored amplification denial-of-service (DoS) vulnerability that impacts PAN-OS, the platform powering its next-gen firewalls.

The corporate has realized {that a} menace actor has tried to abuse firewalls from a number of distributors for distributed denial-of-service (DDoS) assaults. No extra info seems to be out there on these assaults and the opposite impacted companies.

“Palo Alto Networks lately realized that an tried mirrored denial-of-service (RDoS) assault was recognized by a service supplier. This tried assault took benefit of vulnerable firewalls from a number of distributors, together with Palo Alto Networks,” the corporate says.

Tracked as CVE-2022-0028 (CVSS rating of 8.6), the vulnerability exists due to a misconfiguration within the PAN-OS URL filtering coverage, permitting a network-based attacker to conduct mirrored and amplified TCP DoS assaults.

“The DoS assault would seem to originate from a Palo Alto Networks PA-Sequence ({hardware}), VM-Sequence (digital) and CN-Sequence (container) firewall in opposition to an attacker-specified goal,” Palo Alto Networks explains.

Exploitation of the vulnerability, the corporate notes, requires for particular situations to be met, reminiscent of for configurations not typical for URL filtering to be set and packet-based assault safety and flood safety by SYN cookies to not be enabled.

“To be misused by an exterior attacker, the firewall configuration should have a URL filtering profile with a number of blocked classes assigned to a safety rule with a supply zone that has an exterior going through community interface,” Palo Alto Networks explains.

To stop exploitation, customers are suggested to take away the URL filtering coverage that results in this vulnerability, in addition to to allow packet-based assault safety or flood safety on their Palo Alto Networks firewalls – enabling each protections just isn’t vital, the corporate says.

Profitable exploitation of the safety bug could not have an effect on the weak product, however would assist the attacker disguise their id, making it look as if the firewall is the precise supply of the assault.

Thus far, Palo Alto Networks has addressed the vulnerability solely in PAN-OS 10.1, with the discharge of platform model 10.1.6-h6. Patches for PAN-OS 8.1, 9.0, 9.1, 10.0, and 10.2 are anticipated to be rolled out throughout the week of August 15, 2022.

On Wednesday, the US Cybersecurity and Infrastructure Safety Company (CISA) warned directors and customers of this vulnerability, encouraging them to use the out there patches and workarounds.

“Palo Alto Networks has launched a safety replace to handle a vulnerability in PAN-OS firewall configurations. A distant attacker might exploit this vulnerability to conduct a mirrored denial-of service,” CISA notes.

Associated: A number of Vulnerabilities Enable Disabling of Palo Alto Networks Merchandise

Associated: Distant Code Execution Flaw in Palo Alto GlobalProtect VPN

Associated: Palo Alto Networks Patches Flaws in Prisma Cloud Compute, Cortex XDR Agent

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